中国名人成长故事-看花灯
写作练习参考答案
练习
1
(on
page
8)
II.
1.
Nonlinear
distortion
can
be
< p>causedby
too
large
an
input
signal.
2.
the
definition
o f
slope,
we
can
derive
the
equation
which
re presents
a
straight
line .
3.
The
expression
f( x
+
h)
–
f(x)
is
frequently
used
in
the
study
of
calculus.
4.
An
equation
which
can
be p>
written
in
the
following
form
is
known
as
a
linear
equation
in
one
unknown.
5.
In
a
computer,
the
tendency<
/p>
is
to
operate
at
as< /p>
high
a
clock
rate< /p>
as
possible.
6.
The
voltage
across
this
capacito r
is
a
few
hundredths
< p>ofa
volt.
7.
The
output
of
the
factory
ten
years
ago
was
only
one
fifth
what
it
is
now
[
或:
…
only
one
fifth
its
present
output].
8.
The
difference p>
between
these
two
values
is
13
parts
in
10
< p>4
.
9.
Tin
d oes
not
have
as
high
a
melting
point
as
lead p>
(does).
10.
This
averag e
velocity
is
half
the
final
velocity.
11.
It
is
necessary
to
find
h ow
long
a
time
it
ta kes
[
或:
is
required;
< p>isneeded;
is
necessary]
to
solve
this
equation.
12.
This
wire
is
fo ur
times
thicker
than
that
one.
13.
Electricity
can
be
easily
changed
into
other
forms
of
energy.
14.
In
1831,
Joseph
< p>Henryin
the
United
Stat es
discovered
the
phenomenon
of
electromagnetic
induction.
p>
15.
A
receiver
consists
of
several
units
[
或:
parts].
III.
1.
The
newly
designed
instrument p>
is
good
in
quality
[< /p>
或:
…
is
of
good
< p>quality].
2.
This
engine p>
needs
to
be
cleaned
[
或:
cleaning].
3.
This
running
machine
will
stop
of
itself
in
a
minute
or
two
[
或:
…
in
one
or
two
m inutes].
4.
In
this
ca se,
the
input
does
not
fall;
the
output
does
n ot
fall,
either
.
[
或:
…;
neither
[nor]
do
es
the
output.]
5.
The
resistance
of
a
conductor
depends
not
only
on
the
material
of
which
the
conductor
is
made,
bu t
also
on
the
size
a nd
temperature
of
the
cond uctor.
6.
Another
comsat
was
launched
on
< br>the
morning
of
the
8
th
of
October.
I
V.
1.
The
period
with< /p>
which
a
body
undergoes
simple
harmonic
motion
is
the
time
required
for
i t
to
make
one
complete
oscillation.
In
the
case< /p>
of
a
spring,
the
per iod
is
the
time
the
spring
spends
in
going
from
its
maximum
extension,
through
its
maximum
compressi on
and
back
1
to
p>
its
maximum
extension
once< /p>
more.
For
all
types
of
simple
harmonic
motion,
the
period
T
is
given
[
或:
expressed;
denoted;< /p>
represented]
by
T
=
2
π
√
?
-S
?
/a
?
,
where
the
acceleration
a
is
th at
experienced
by
the
body
when
it
is
at
its p>
specified
position.
2.
×
×
:
male,
professor,
advisor
for
doctoral
students ,
and
academician
of
the p>
Chinese
Academy
of
Scie nces.
He
graduated
from
th e
Department
of
Radar
at p>
the
Institute
of
the
Communications
Engineering
of
< p>thePeople’s
Liberation
Army p>
of
China
in
1953.
After
graduation
he
remained
at
the
Institute
as
a< /p>
faculty
member.
He
success ively
held
the
posts
o f
head
of
a
teaching
and
research
section,
chairman< /p>
of
a
department,
and
vice
president
of
the
Institute.
From
1984
to
1 992
he
served
as
president
of
Xidian
University.
He
is
currently
chairman
of
the
Academic
Commission
of
Xidian
University
and
chairman
of
the
Academic
Commission
of
the
National
Key
Laboratory
of
Radar
< p>Signal
Processing.
He
is p>
also
member
of
the
Co mmittee
of
the
National
Sc ience
Fund
for
Outstanding
p>
Youths,
and
fellow
of
the
Chinese
Institute
of
Electronics.
He
has
long
been
engaged
in
research
< p>andteaching
in
the
fiel ds
of
radar
and
inform
ation
processing.
In
recent
< p>years,his
research
interests< /p>
focus
on
statistical
signa l
processing,
array
signal p>
processing,
and
self-adaptive
signal
processing.
………………………………
………………………………………………………………………..
练习
2
(on
page
23)
II.
1.
This
book
is
of p>
great
help
to
electronic
engineers.
2.
Of
the
first
four
chapters
,
C hapter
3
is
the
most
important.
3.
This
problem< /p>
can
be
solved
with
g reat
ease
.
4.
In
< p>thiscase,
current
leads
voltage
by
90
o
.
5.
Through
the
analys is
of
the
parameters
of
this
device
[
或:
By
analyzing
the
parameters
of
this
device],
we
can p>
understand
its
performance.
6.
For
x
>
0< /p>
,
there
is
no
soluti on
to
the
equation.
7.
Now
it
is
necessary
for
us
to
solve
this
< p>equationfor
that
unknown
< p>.
8.
Upon
substitution
of
these
values
,
it
is
found
that
v
is
equal
to
the
velocity
of
light.
9.
Capacita nce
is
measured
in
farads< /p>
.
10.
This
computer
is
very
small
in
s ize
.
11.
These
wa ves
travel
only
in
one
direction
.
12.
In
their
study
of
electricity
,
physicists
defined
electric p>
field
intensity.
13.
Th is
answer
appears
correct
.
14.
This
coefficient
remains
to
be
determined
.
2
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
II
I.
The
two
equations
< br>below
will
be
used
often
in
later
chapters.
< br>Here
we
use
two
metal p>
balls
two
meters
apart
< p>.
This
paper
contains
< p>nothingnew
.
[
或:
There
is
nothing
new
in p>
this
paper.]
The
force< /p>
acts
perpendicular
to
the< /p>
surface
of
the
table
.
This
rule
can
be
used
for
[
或:
…
can
apply
to]
all
integers ,
both
positive
and
ne gative
.
A
neutron
has
a
slightly
larger
mass
than
a
proton
.<
/p>
[
或:
…
has
a
m ass
slightly
larger
than
that
of
a
proton.]
Electrons
are
the
smallest
particles
present
in
ordinary p>
matter
.
[
或
:
…
particles
that
exist
in
ordinary
matter.]
All
the
textbooks
available
discuss
this
problem.
Ac
curate
in
operation
and
hi gh
in
speed
[
或:
In< /p>
view
of
their
accurate
operation
and
high
speed] ,
computers
have
found
wid e
applications.
Medium-size
computers
now
perform
as
l arge
computers
not
long
ag o
[
或:
of
near
past]
did
.
The
input p>
voltage
goes
negative
and p>
the
energy
stays
constant p>
.
These
rays
seem
to
come
from
the
image
.
Impedance
in
an
a-c
circuit
plays
the
same
role
that
resistance
does
in
a
d-c
circuit.
< br>Two
parallel
wires
a
di stance
(of)
δ
apart
carry< /p>
the
current
i
.
The
equations
here
are p>
of
great
importance.
We
shall
use
a
cable
1 0
meters
long
.
1.
That
professor
is
much
[
或:
very]
interested
in p>
this
topic.
2.
These
multimeters
are
much
alike p>
in
size
and
weight.
< br>3.
This
voltage
can
har dly
be
measured.
4.
In
this
laboratory,
this
ins trument
is
better
than
any
other
one
[
或:
…
than
any
one
else].
5.
To
repair
the
machine ,
the
serviceman
has
to
remove
the
cover
.
[ p>
或:
Before
the
machine
can
be
repaired,
the
cover
has
to
be
removed.]< /p>
6.
The
preface
to
< p>thisbook
is
well
writte n.
IV.
1.
The
prim ary
winding
of
a
transform er
is
the
coil
which
is
fed
with
an
alternatin g
current,
and
[
或:
while]
the
secondary
winding
is
the
coil
to
whic h
power
is
transferred
via
the
changing
flux.
Th e
designations
of
the
prim ary
and
the
secondary
depe nds
only
on
how
the
transformer
is
connected;
ei ther
winding
may
be
the
primary,
and
the
other
is
then
the
secondary.
2.
×××
:
male
and
born
in
Funing
County,
Jiangsu
Province
in
1962.
He
graduated
from
Xidian
University
and
earned
the
B.
Eng.
Degree,
the
M.
Eng.
Degree,
and
the
< p>Ph.D.
3
degree
in
1982,
1985,
and
1990
respectively.
In
1994
he
was
exceptionally
promoted
to
professor.
Presently
he
holds
the
posts
of
dean
of
the
School
of
Te lecommunications
Engineering
of
Xidian
University
and
direct or
of
the
Research
Institu te
of
Information
Science.
p>
He
is
an
advisor
for< /p>
doctoral
students,
a
fello w
of
the
Chinese
Institute
of
Communications,
a
senior
member
of
IEEE,
and
a
senior
member
of
the
Chinese
Institute
of
Electronics.
He
was
granted p>
the
title
of
“Expert
with
Distinguished
Achievements”
of
both
Shaanxi
Province
and
the
Ministry
of
El ectronics
Industry.
He
is
a
recipient
of
the
Gov
ernment
Special
Subsidy.
He<
/p>
is
engaged
in
the
re search
in
the
fields
of
mobile
communication,
personal
communication,
and
so
on.
He
has
obtained
one
“National
Invention”
patent
and
won
quite
a
few
Science
and
Technology
Progress
Awards
at
provincial
and< /p>
ministerial
levels.
……………………
………………………………………………………………………………
练习
3
(on
page
31)
II.
1.
Since
feedback
plays p>
an
important
role
in
electronic
circuits,
its
study p>
is
of
great
importance.
2.
The
black
hole
is
invisible,
but
its
p resence
can
be
deduced.
3.
Electromagnetic
waves
trave l
at
the
speed
of
li ght,
and
require
no
materi al
for
their
passage
.
4.
From
its
definitio n
as
the
ratio
of
di stance
to
time,
speed
is p>
expressed
in
meters
per
second.
5.
Their
diff erence
in
this
case
is
13
parts
in
a
million p>
[
或:
per
million;
in< /p>
10
6
].
6.
Our
analysis
of
the
dio de
will
be
of
great
significance.
7.
This
facili tates
their
use
in
circuit
analysis.
8.
The
succ ess
in
design
depends
on p>
our
correct
choice
of
the
circuit.
9.
It
is
necessary
to
take
into
account
their
collisions
wit h
each
other.
10.
Here
we
must
use
wires
< br>one
thousandth
the
diameter p>
of
a
silk
thread.
11.
This
law
holds
(true)
for
[
或:
applies
to ]
the
bodies
the
speed
of
a
rocket.
12.
We
must
frequency
modulate
t he
carrier.
13.
This
d evice
is
radio
controlled.
14.
AC
can
be
changed
into
DC,
a
process
called
rectification
.
15.
p>
To
solve
this
problem,
< p>wemust
take
everything
into
account,
a
complicated< /p>
procedure
.
16.
An
instrument
for
measuring
current,
voltage
and
resistance< /p>
,
the
multimeter
is
17.
widely
used
in
the
work
having
connection
< p>withelectricity.
This
pap er
deals
with
advantages
o f
AC
over
DC
.
4
18.
19.
20.
< br>The
answers
to
these<
/p>
problems
appear
in
the
back
of
the
book.
T
his
curve
shows
the
fall p>
in
[
或
:
of]
co nductivity
with
increasing
[
或
:
increased]
temperatur
e.
These
materials
are
pressure
sensitive
.
III.
p>
features
of
th is
device
are
small
si ze
and
light
weight
.<
/p>
types
of
electric
motor
are
also
widely
u sed
in
industry.
3.
No
students
[
或:
None
of
the
students]
can
solve
this
special
kind
of
< p>equation.
4.
Not
until
the
invention
of
the
mi croscope
did
the
real
stud y
of
bacteria
become
possi ble.
do
not
know
< p>ifthis
material
could
s tand
so
large
a
fo
rce
[
或:
…
whether
t his
material
could
stand
so
large
a
force
or
not].
machine
will
automatically
start
to
operate< /p>
again
in
two
hours
.
IV.
1.
The
second
law
of
motion
provides
a
method
for
measuring
what
is
called
the
“inert ial
mass”
of
a
body. p>
All
one
needs
to
do p>
is
[OR:
All
that
is p>
necessary
is;
One
only
< p>needs]to
apply
the
same
force
in
turn
to
< p>astandard
of
mass
and p>
to
an
unknown
mass
an d
then
to
compare
thei r
accelerations,
something
that< /p>
[OR:
…,
which]
can
b e
done
anywhere
in
the
universe
with
the
same
results.
No
matter
where
we
are,
we
can
always p>
tell
a
wooden
ball
from
a
lead
ball
of
< p>thesame
size
by
throwin g
them.
2.
××
×:
male,
born
in
1938,
profe ssor,
and
advisor
for
doct oral
students.
He
graduated
< p>from
the
Xi’an
Military
Telecommunications
Engineering
Ins titute
in
1964
and
remaine d
there
as
a
faculty p>
member.
He
has
long
b een
engaged
in
the
teachin g
and
research
in
the
< p>field
of
radar.
Through
close
cooperation
with
quite
a
few
radar
research
< p>institutesand
enterprises,
has
successively
undertaken
or
taken
charge
of
more
than
twenty
national
defence
key
preliminary
rese arch
projects
and
engineering
projects
with
many
practical
achievements,
most
of
which
have
been
popularized
and
applied,
or
used
to
equip
the
armed
force s,
thus
making
contributions
to
the
development
of
r adar
technology
in
China.
…………………………………………………………………………………………………
练习
4
(on
page
39)
II.
1.
This
equipment, p>
it
is
said
,
was
< p>commerciallyavailable
three
y ears
ago.
[OR:
It
is
said
that
….;
This
eq uipment
is
said
to
have
been
commercially
available
three
years
ago.]
2.
h
fe
is
a
p arameter
which
we
think
is
very
important.
3.
No w
we
connect
a
conductor p>
charged
with,
let
us
say
,
positive
electrici ty,
to
the
ground.
5
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
< br>18.
19.
20.
21.
p>
III.
√
-1
√
- 1,
it
was
agreed
,
should
be
replaceable
by< /p>
–1
at
will.
Velocity,<
/p>
we
have
noted
before
,
is
a
vector
quantity. p>
None
of
these
windows p>
can
withstand
so
large
< p>aforce.
All
the
com puters
in
our
laboratory
a re
not
very
good
in
quality.
No
textbooks
av
ailable
[OR:
None
of
the p>
textbooks
available]
have
m entioned
this
point.
Stu
dents
are
familiar
with
no ne
of
these
parameters
. p>
[OR:
No
students
are
familiar
with
these
paramete rs.]
In
this
shop
all< /p>
these
components
are
not p>
available.
As
early
as< /p>
the
1820s,
it
had
realized
that
this
metal
could/can
be
used
< p>in
industry.
They
have
been
developing
a
special
kind
of
robot
since
1998.
Full
use
must
b e
made
of
the
equipment
available.
[OR:
The
equipmen t
available
must
be
ma de
full
use
of.]
It
is
expected
that,
by
t he
time
the
device
arrives
at
that
research
institut e,
the
technical
personnel p>
there
will
have
studied
its
principle
of
operation. p>
Attention
must
be
paid< /p>
to
the
polarities
of
this
battery.
[OR:
The
po larities
of
this
battery
must
be
paid
attention
to.]
Sound
travels
much
< p>morerapidly
in
hydrogen
than
in
air.
Some
dev eloped
countries
use
as
mu ch
as
60
kilograms
of
< p>paperfor
each
person
in
a
year.
The
darke r
the
color,
the
more
< p>heatis/will
be
absorbed.
< p>The
greater
the
resistance
of
a
wire,
the
more
energy
will
be
dissipated
in
it.
Of
all
t hese
instruments
,
this
on e
is
most
commonly
used. p>
This
astronomical
observatory
is
the
largest
in
o ur
country.
1.
This
ex periment
begins
at
eight
o’clock/
in
May/
tomorrow
.
2.
The
voltage
across
the
resistor< /p>
is
measured
in
volts.
< p>3.
Both
the
engineers
< p>arebusy
(in)
designing
a
new
type
of
computer.
[OR:
…
busy
with
t
he
design
of
….]
4.
Copper
is
a
kind
of
matter
and
so
is
air.< /p>
5.
We
find
this
concept
very
difficult
to
explain
.
6.
They
will
leave
for
Beijing
to
attend
an
international
< p>conferenceon
communications.
IV.
1.
When
a
wire
loop
surrounds
a
stationa ry
magnet,
no
current
flow s
in
the
loop.
What
Faraday
and
Henry
discovered
was
that
moving
the
magnet
causes
a
current
t o
flow
in
the
6
loop.
It
does
not
matt er
whether
the
magnet
or p>
the
loop
is
actually
being
moved;
the
origin
of
the
current
lies
in p>
the
relative
motion
between
a
conductor
and
a
m agnetic
field.
2.
A
le ver
is
a
rigid
rod
p ivoted
at
a
certain
point< /p>
called
the
fulcrum.
Fig. p>
12-1
shows
the
most
familiar
type
of
lever,
with
a
load
at
one
end
being
balanced
by
an p>
applied
force
at
the
other.
The
condition
for
equilibrium
is
that
the
torques
produced
by
F
in
and
F
out
be
the
same
in
mag nitude.
3.
×
×
×
:
male
and
born
in
December
1941.
He
graduated
< p>fromthe
Xi’an
Military
Telecommunications
Engineering
Ins titute
(the
predecessor
of
Xidian
University)
and
rema
ined
at
the
institute
as p>
a
faculty
member.
From
< p>1981to
1983
he
stayed p>
at
the
University
of
Pennsylvania,
U.S.A.
for
fur ther
studies,
engaged
in
t he
research
on
image
a
nalysis
&
processing
and
r adar
imaging.
From
1989
to
1990
he
went
to
the
United
States
and
Bri tain
successively
as
a
vis iting
scholar.
Currently
he
< p>servesas
president
of
< br>Shenzhen
University,
being
an
advisor
for
doctoral
stud ents
of
Xidian
University
in
the
academic
area
o f
signal
and
information
p rocessing.
He
has
been
in< /p>
charge
of
and
undertak
en
quite
a
few
projects, p>
all
with
high-level
achieve ments.
………………………………………………………………………………………
………….
练习
5
(on
page
43)
II.
1.
It
is
quite
possible
for
us p>
to
solve
this
equation.
2.
It
takes
only
a< /p>
few
months
to
design
a
new
type
of
airplane
with
the
help
of
a
computer.
3.
It
remai ns
now
for
us
to
cal culate
the
resistance
in
t his
circuit.
4.
It
is< /p>
left
as
a
problem
to
the
reader
to
show
that
this
formula
holds.
< br>5.
The
program
to
be
executed
is
stored
in
this
unit.
6.
This
val ley
is
used
as
the
f oundation
on
which
to
buil d
the
dam.
7.
There
are
many
types
of
mult imeters
to
choose
from.
8.
The
velocity
of
light
is
too
great
to
be
measured
in/with
simple
< p>units.
9.
Let
it
be< /p>
required
to
find
out
this
angle.
10.
Let
< br>t
o
be
equal
to
zero.
11.
This
equati on
is
very
difficult
to
solve.
12.
The
farther p>
away
the
target
(is),
the
longer
it
takes
for p>
the
echo
to
return.
< br>13.
We
find
this
proble m
easy
to
solve.
1
4.
For
this
series
to
< p>converge,
x
must
be
less
than
1.
15.
T he
ability
of
a
capacitor< /p>
to
store
a
charge
is
affected/influenced
by
a
few
factors.
16.
This
is
a
pen
to
draw
pic tures
with.
17.
For
Q< /p>
2
to
conduct
,
its
base
must
be
about< /p>
1.8
volts.
7
18.
p>
We
have
to
find
out p>
how
large
to
make
r
so
as
for
the p>
series
to
converge.
III
.
1.
Substituting
Eq.
(7)
in/into
Eq.
(8)
,
< p>weobtain/have/get
a=b.
[
或:
Substitution
of
Eq.
(7)
into/in
Eq.
(8) p>
gives/yields/results
in
a=b.<
/p>
2.
Sound
travels
less< /p>
fast
than
light
does.
3.
Every
one/Eac h
of
the
methods
has p>
its
advantages
and
disadvantages.
4.
Work
equal s/is
equal
to
force
multip lied
by
distance
[
或
:
Work
equals
force
times
distance.
或:
Work
is< /p>
the
product
of
force
and
distance.]
5.
Usually p>
we
can
not
see
the
earth’s
shadow,
because
ther e
is
nothing
for
it
to
fall
on.
6.
This
equipment
has
quite
a
few
advantages
all
i
ts
own.
IV.
1.
2.
3.
V.
Xidian
University
is
a
national< /p>
key
institution
of
higher< /p>
learning/education
which
integra tes
engineering,
science,
li beral
arts
and
management,
with
information
and
electronic s
as
the
dominant
acad emic
areas.
It
is
located< /p>
in
the
ancient
cultural
city
of
Xi’an
and
occu pies
an
area
of
60
hectares
with
a
beautiful
environment
on
the
campus.
It
has
established
nine
< p>schoolsand
one
college,
p>
i.e.,
School
of
Telecommuni cations
Engineering,
School
of p>
Economy
and
Management,
School
of
Electronic
Engineerin g,
School
of
Computer
Scie nce
and
Technology,
School
of
Mechano-Electronic
Engineering ,
Adult
Education
College,
etc.
There
are
17
departm ents
with/covering
over
60 p>
specialties
for
undergraduates
and
junior-college/three-year-program
students.
The
University
has
the
right
to
examine< /p>
and
approve
professorship
and
qualifications
for
docto
ral
advisers.
It
has
set p>
up
about
34
academic
areas
for
master’s
degrees
and
14
academic
areas
for
doctoral
degrees,
of
which
there
are
3
national
key
areas
(i.e.,
“communi cation
and
electronic
system ”,
“signal
and
information
processing”,
and
“circuit
and p>
system”)
and
11
ministe
rial-level
key
areas.
………………
……………………………………………………………………………………….
练习
6
(on
page
49)
II
.
1
.
A
transformer
is
a
device
co nsisting
of
two
or
more
coils
wound
on
the
iro n
core.
2.
This
book,< /p>
properly
used,
is
of
great
help
to
the
reader.
3.
The
magnetic
lines
of
force
representing
the
magnetic
field
are
concen tric
circles
8
This
method
has
the
advan tages
of
high
efficiency
a nd
easy
adjustment.
The
law
of
the
variatio n
of
the
light
intensity p>
with
the
cylinder
diameter< /p>
has
been
emphasized.
< br>Our
method
is
different
from
those
described/presented
in
the
papers
available
on/discussing
the
same
problem .
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.<
/p>
15.
16.
III.
< br>surrounding
the
wire.
In<
/p>
this
case,
electrons
will< /p>
possess
greater
energy
[ p>
或:
the
energy
electrons
possess
will
be
greater],
(thus)
increasing
the
bri ghtness
of
the
spot.
T
he
sunlight
falling
upon
p hoto-electric
cells,
the
device< /p>
will
automatically
go
into
operation.
Given/Knowing
and
speed,
we
c an
find
out
distance.
All
these
networks
have
th e
property
of
being
able p>
to
transform
impedance
leve ls.
Enzymes
increase
the
speed
of
chemical
reactions p>
without
being
changed
thems elves.
By
finding
two
points
on
the
straight
lin e,
we
can
draw
the
l ine.
Finding
the
possible
values
of
these
symbols
< p>is
called
solving
the< /p>
equation.
Automation
is
< p>nota
question
of
machin es
replacing
man.
These
circuits
were
desig ned
with
one
or
two
uses
in
mind.
Let
us p>
construct
a
circle
of
radius
R
,
with
t he
origin
as
the
center. p>
The
equation
to
the
circle
with
the
center
at
the
origin
and
of
radius
a
is
x
2
+
y
2
=
a
2
.
With
other
gates
as
loads,
the
output
voltage
will
be
approximately
3.5
volts.
With
u
=2
km/sec
and
v
=11.2
km/sec, p>
m
0
/m
1
=
270.
1.
By
obser ving
the
effect
of
a
new
drug
on
the
patients,
one/we
can
see
its
therapeutic
effect.
2.
I ron
is
almost
as
good
< p>aconductor
as
aluminium.
< p>3.
It
is
easy
for
us
to
determine
the
we ight
of
the
body.
4.
p>
Friction
makes
the
work
put
into
a
machine
grea ter
than
the
useful
work p>
accomplished
by
it.
5.
On
being
heated,
the p>
air
in
the
bottle
wil l
expand.
6.
Many
of p>
the
principles
of
a
r eceiver
also
apply
to
a
transmitter.
IV.
1.
2.
3.
V.
Current
ly
the
University
has
1285 3
students
of
various
type s,
of
whom
there
are
7658
undergraduates
and
abo ut
900
graduate
students.
In
more
than
60
years
< p>sinceits
founding,
it
h as
produced
over
60000
graduates
of
various
types
< p>whowork
in
the
fields p>
of
national
defence,
9<
/p>
Only
through
the
s tudy
of
[OR:
Only
by p>
studying]
the
performance
o f
the
system,
can
one/we
appreciate/understand
its
advantages.
If
the
self-bia s
circuit
is
of
poor
design
[OR:
is
not
design ed
well/properly],
chopping
oscillations
will
take
place
in
the
LC
oscillator.
This
paper
presents
a
CAD
method
for
increasing
the
printing
speed
and
improving
the
printing
q uality.
electronics,
posts
a nd
telecommunications,
aerospace
and
aviation
in
China,
ac hieving
splendid
results
in< /p>
the
nation’s
economic
cons truction.
The
University
enj oys
a
well-qualified,
high
academic
level,
and
reasonably< /p>
structured
contingent
of
teachers.
There
is
now
a
teaching
and
administrative
staff
of
over
3200,
of
whom
there
are
more p>
than
2100
technical
profess ionals,
with
1
academician
of
the
Chinese
Academy
of
Sciences,
26
national
or
provincial
&
ministerial-lev el
experts
who
have
made p>
outstanding
contributions,
an d
over
600
teachers
with p>
senior
academic
titles.
……………………………………………………………………………………………………
练习
7
(on
page
54)
II.
1.
Heat
rays
are
emitted
by
all
(material)
bodies
no
matter
how
< p>lowtheir
temperatures
are
.
2.
Small
as
they
are,
atoms
are
made
up< /p>
of
still
smaller
units.
3.
The
measurement
of
angles
is
unique
in
th at
the
unit
is
dimensionle ss.
4.
The
body
is
in
such
a
state
that
it
can
do
work.
5.
These
double-angle
formulas
can
be
used
any
time
we
have
expressed
one
angle
as
twice
another.
< p>6.
The
problem
was
n ot
to
be
solved
until
< p>aradically
new
and
diff erent
concept
was
introduced
.
7.
Something
further
must
be
done
to
these
signals
before
they
are
fed
to
the
subsequent
stage.
8.
Every
substance,< /p>
be
it
[
或:
whether p>
it
be]
a
solid,
a
liquid,
or
a
gas,
consi sts
of
atoms.
9.
There
are
various
indications
[
或:
All
indications
are] p>
that
the
price
of
com puters
will
continue
to
< p>fall.
10.
There
is
n o
evidence
that
energy
can
be
created
or
destroyed.< /p>
11.
In
this
case
there
is
no
assurance
tha t
the
circuit
is
tuned
to
that
frequency.
12.
These
experiments
lead
to
the
result
that
with/for
a
constant
force,
the
acceleration
is
inversely
proportional
to
the
mass.
13.
The
idea
that
eve rything
is
made
up
of
< p>verysmall
particles
was
known
to
the
Greeks
1
4.
15.
16.
17.
over
two
thousand
years
ago.
Since
then,
there
have
been
speculations
wheth er
life
exists
on
other
planets.
This
is
due
to/results
from/arises
from/is
< p>causedby
the
fact
t
hat
there
exists
capacitance
in
the
circuit.
Besid
es
the
fact
that
the
properties
of
the
material
< p>shouldbe
included
in
th e
analytical
model,
we
must
take
other
factors
i nto
account.
The
term
follower
comes
from
the< /p>
fact
that
the
output
voltage
follows
the
signal
< p>voltage
10
quite
close ly.
18.
Using
the
fact
that
the
curve
passes
through
(2,
1),
we
can< /p>
evaluate
the
constant.
19.
The
usefulness
of
the
Karnaugh
map
lies
in
< p>thefact
that
adjacent
c ells
can
be
grouped
vi
sually
to
eliminate
redundant
variables.
20.
This
seri es
of
experiments
leads
to
the
result
that
with< /p>
a
constant
force,
the
< p>acceleration
is
inversely
proportional
to
the
mass.
III.
1.
2.
3.
4.
5.
6.
IV.
1.
The
mathematical
d escription
of
and
the
full -compensation
conditions
for
the
3-
axis
steady-tracking
principle
are
also
given.
2.
A
comparison
of
STM
and
ATM
is
made
,
which
shows
that
ATM
will
be
the
basis
of
BISDN.
[
或:
A
comp arison
between
STM
and
ATM
shows
that
ATM
will
be
the
basis
of
BISDN
.]
3.
A
detailed
analy sis
of
the
ability
of
< p>thecomponents
to
carry
loads
is
made
.
V.
The
University
persists
i n
the
principle
of
cultiva ting
students
with
all-around
development
of
morality,
intelligence
and
physique,
and< /p>
pays
great
attention
to
the
teaching
of
both
b asic
theories
and
practice.< /p>
By
adhering
to
high
and
strict
demands,
it
has
practised
setting
some
ou tstanding
teachers
as
its
Prestigious/Top-Notch
Teachers
and
establishing
some
Best- Quality/First-Rate
Courses.
It
has
also
practised
the
credit
system,
the
system
of
selecting
excellent
students,
the
scholarship
system,
the
system
of
giving
aw ards
to
outstanding
teachers,
the
system
of
encouragin
g
undergraduates
to
take
b oth
a
major
and
a
mi nor,
the
system
of
enrolli ng
some
bright
high-school
p>
graduates
as
college
studen ts
and
some
outstanding
co llege
graduates
as
graduate
< p>students
without
their
sit ting
for
the
national
entr ance
examinations,
and
the
system
of
retaining
the
qualification
of
some
college
graduates
to
enter
their< /p>
graduate
programs
in
a
few
years
after
passing
p>
the
entrance
exams,
all
of
which
are
reforms
ca rried
out
at
the
Universit y.
The
University
had
widely
promoted
exchange
and
cooperation
at
home
and
abroad
and
successively
est ablished
friendly
cooperative
re lations
with
a
batch
of
famous
universities
of
USA,< /p>
Japan,
Russia,
Holland,
< p>andCanada,
and
with
man y
institutions
of
higher
l earning
at
home.
It
has
carried
out
the
activiti es
of
the
joint
cultivatio n
of
graduate
students,
th e
cooperative
scientific
11<
/p>
Air
exerts
pressure
in
every
direction.
The
hotter
the
body
(
is
),
the
more
energy
it
radiates.
This
is
the
largest
aircraft
that
has
ever
been
manufactured
in
China.
Semiconductors
w ill
be
discussed
in
Chapte r
2.
The
ability
of
some
elements
to
give
off
radiations
is
referred
to
as
radioactivity.
To
do
all
this
,
a
s ound
knowledge
of
computer
science
is
necessary.
resea
rch,
and
the
mutual
invita tion
of
scholars
to
delive r
lectures.
…………………………………………………………
………………………………………..
练习
8
(on p>
page
58)
II.
1.
Which
equation
we
should< /p>
use
will
depend
on
what
data
we
have
b een
given
in
the
probl
em.
2.
It
is
obvious p>
that
these
systems
will
function
together.
3.
It< /p>
is
a
well-known
fact
that
all
matter
is
made p>
up
of
minute
particles.
4.
It
has
been
foun d
that
the
direction
of
the
current
is
just
op posite
to
that
of
the
< p>electron
flow.
5.
It p>
follows
(from
above)
that p>
the
slope
at
that
poi nt
is
zero.
6.
It
< p>canhappen
that
the
over all
phase
shift
becomes
ze ro.
7.
At
first
glance
it
does
not
appear
that
this
integral
fits
an y
of
the
forms
presented p>
in
this
chapter.
8.
It
does
not
matter
how
we
define
f(x).
9.
It
makes
no
differenc e
which
point
is
chosen
as
the
origin.
10.
It
is
necessary
to
determ ine
under
what
conditions
this
equation
is
true.
11.
It
often
happens/It
i s
common/It
is
often
the p>
case
that
we
may
obta in
different
forms
of
solution.
12.
From
what
< p>hasbeen
described
above
it
follows
that
F
= p>
ma.
13.
This
device
is
just
what
we
need. p>
14.
Now
let
us
su mmarize
what
has
been
prov ed
so
far.
15.
This
value/Magnitude
is
quite
dif ferent
from
what
it
was. p>
16.
Current
changes
wit h
what
is
called
resistanc e.
17.
This
integral
i s
what
is
known
as
t he
improper
integral.
18.
The
reader
can
understand
what
the
function
of
t his
device
is
[
或:
…
what
this
device
can<
/p>
do/perform.]
19.
What
a
generator
does
is
(to) p>
convert
mechanical
energy
i nto/to
electrical
energy.
20
.
This
magnetic
force
is p>
what
makes
electric
motors< /p>
run.
III.
1.
By
power
is
meant
the
spe ed
,
or
rate,
of
doi ng
work
[
或:
…
or
rate,
at
which
work
is
being
done].
2.
I n
this
case
[OR:
Under
this
condition],
the
wheel
will
rotate
(by/through)
360
o
.
3.
The
temperature
of
the
water
is
read
at
two-minute
i ntervals.
4.
The
direction p>
of
an
electric
current
< p>was/hadbeen
decided
before
electrons
were
discovered.
12
5.
Neither
those p>
receivers
nor
this
transmit ter
is
out
of
order.
6.
The
question
(that/which)
we
are
discussing< /p>
now
is
what
radio
wa ves
are.
IV.
1.
Th ere
are
m
polygons
altogether/in
all
,
each
of
which
has
N
ver
texes.
[
或语法上正确、
但很不好的一个句型:<
/p>
…,
the
number
of
ver texes
of
each
of
which
is
N.
]
2.
This
is
due
to
the
fact
that
there
exists
a
capacitance
across
the
PN
junction.
[
或更简洁的< /p>
一个句型:
…
due
to
t he
existence
of
a
capacita nce
across
the
PN
junction .]
3.
This
method
requ ires
accurate
location
,
t hus
making
[OR:
which
make s]
its
realization
somewhat<
/p>
difficult.
V.
The
Qin
Yong-brand
whole
milk
powder
is
made
from
high-q uality
fresh
milk,
white
s ugar
and
trace
elements
< p>neededby
the
human
body
by
scientific
methods
and
Denmark’s
advanced
technolo
gy.
The
Qin
Yong-brand
whole
milk
powder
contains
< p>calcium,protein
and
varied
vitamins,
and
it
can
be
mixed
with
lukewarm
sanitary
drinking
water
into
[OR:
…
can
be
blended p>
with
lukewarm
sanitary
drinking
water
to
produce]
the
best
fresh
milk.
The< /p>
product
is
truly
a
t onic
suitable
for
both
the
old
and
the
young.
Taking
it
for
a
long p>
time
is
beneficial
/of
< p>benefitto
[OR:
is
g ood
for]
the
development
o f
the
brain
and
the
improvement
of
health.
If
you
find
anything
wrong
< p>withthe
product,
please
give
us
a
phone
call
< p>[OR:please
let
us
k
now
by
phone].
Our
tel ephone
number:
………………………………
……………………………………………………………………..
练习
9< /p>
(on
page
68)
II.
1.
There
is
another
f orm
of
energy
we
must
< p>takeinto
account.
2.
can
find
a
force
< p>towhich
these
two
force s
are
equivalent.
3.
W e
shall
first
discuss
the< /p>
waves
whose
frequency
is
constant.
4.
The
me ter
which
is
used
to
measure
current
is
known
as
an
ammeter.
5.
Most
of
the
information
we
get
in
our
everyday
lif e
is
obtained
through
the< /p>
medium
of
light.
6
.
The
special
frequency
at
which
X
L
=
p>
X
C
is
called
the
resonant
frequency.
7.<
/p>
During
the
ten
years
since
this
book
was
p ublished,
great
changes
have
been
seen
in
electron
ics.
8.
This
is
the
most
sensitive
instrument
th at
we
have
ever
had
in
our
laboratory.
9.
Everything
that
is
hot
rad iates
energy.
10.
We
m ust
calculate
the
distance
the
body
is
lifted.
1
3
11.
12.
13.
14.
15.
16.
17.<
/p>
18.
III.
1.
2.
3.
4.
5.
6.
IV.
The
direction
the
plane
flies
i
s
an
important
factor.
n
2
is
odd,
which
means/indicates
that
n
is
odd.
I
1
is
much
greater
than
< br>I
2
,
in
which< /p>
case
I
2
can
p>
be
neglected.
As
we
shall
see,
the
free
ele ctrons
in
a
conductor
also
play
an
important
role
in
the
conduction
of
heat.
As
the
name
s hows,
this
chapter
deals
with
periodic
functions.
Such
meters
as
we
use
< p>tomeasure
resistance
are
< p>spokenof
as
ohmmeters.
We
must
first
determine
< p>thelimit
as
c
→
∞
.
It
is
generally
possible
to
write
down
more
loop
equations
than
are
needed.
Not
only
d o
temperature
and
light
af fect
the
conductivity,
but
the
addition
of
impurities
< p>to
semiconductors
will
als o
make
it
change
greatly.< /p>
Satellites
are
frequently
launched
to
obtain
informati on
about/on
space.
Our
semiconductor
industry
came
int o
being
at
the
end
o f
the
1950s.
The
direc t
current
flows
always
in< /p>
one
direction.
An
8-vo lt
battery
must
be
used
here.
My
colleagues
and< /p>
I
would
like
to
expr ess
our
thanks
to
Professo r
W.
Smith
for
his
g reat
help.
1.
The
recognition
of
A
and
the p>
determination
of
B
are
< p>theprerequisites
for
the
< p>useof
this
method.
2.
Finally,
some
problems
that
deserve
to
be
not ed
in
implementing
this
me thod
and
their
solutions
are
presented.
3.
A
new
technique
for
estimating
the
Doppler
frequency
rate p>
is
proposed
which
gives
a
high
accuracy
and
requires
a
small
amount
o f
computation.
V.
A
wild
plant,
JUEMA
belongs
to
the
rose
fam ily.
[
或:
JUEMA
is
a
highland
wild
plant
belonging
to
the
rose
f amily.]
It
contains
vitamins
and
elements
such
as
ir on,
magnesium,
calcium,
(and )
zinc.
Pharmacological
study
shows
[OR:
It
has
been
proved/shown
through
pharma
cological
study]
that
taking
it
for
a
long
time
< p>[OR:a
long-term
administratio n/intake]
will
prolong
life,
resist
cancer
and
reduce< /p>
weight.
It
is
also
a
good
gift
for
your
relatives
and
friends.
…
…………………………………………………………………………………………………..
练习
10
(
on
page
75)< /p>
II.
1.
Without
sem iconductors,
satellite
communications< /p>
would
be
impossible.
1
4
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