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pancake最新流利说_懂你英语_Level3_Unit3讲课讲稿

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2021-01-09 18:45
tags:英语学习, 外语学习

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2021年1月9日发(作者:韦江凡)
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Level3 Unit3 Part1 Listening - Life & Conditions 1
There are many forms of life on Earth, including human beings.
Life exists in a variety of conditions.
Some forms of life live in a watery environment, like the oceans.
Other forms of life can be found in very dry areas like deserts.
However, for any form of life to exist, conditions must be right.
When conditions are not right, that form of life will become extinct.
To become extinct means to die out completely.

Conditions must be right for life to exist.
Millions of years ago there were forms of life that no longer exist.
When conditions changed, these forms of life died out.
One extinction event happened about 250 million years ago.
This was the largest extinction event of all time.
Many forms of life became extinct.
96% of all life in the oceans died out.
Most insects also became extinct.
This event happened over a period of several million years.

The causes of this extinction event are still unknown.
Possible causes include large volcanic eruptions and global warming.
Some scientists believe that there were several causes.
They believe that a series of events caused the extinctions.
Scientists are working to better understand what really happened.

Level3 Unit3 Part1 Listening - Life & Conditions 2
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In modern times we humans face changing conditions.
For humans to live, we need clean air and clean water.
Pollution is now a growing problem around the world.
Pollution poisons the air and water that we depend on.
Polluted air makes people sick and afraid to go outside.
Polluted water poisons our food supply.
As a result, we never know which foods are safe to eat.
Human beings cannot live in a poisoned environment.
Therefore, pollution is a major threat to our existence.

Humans need temperatures to be in a comfortable range.
To be in a comfortable range means to be neither too hot nor too cold.
With global warming, global temperatures are rising.
As temperatures rise, the polar icecaps will melt.
As the polar icecaps melt, ocean levels will rise.
Areas of some countries will soon be under water.
People will be forced to relocate from flooded areas.

In nature, even small changes can sometimes have large effects.
It’s difficult to predict what’s going to happen.
The entire ecosystem that we depend on is changing.
Some of these changes are irreversible.
Irreversible changes cannot be undone.

Let’s hope that humans are smart enough to understand how the world is changing.
With more understanding, we can make better choices about what to do.
We can face the challenges of pollution and global warming.
We need to do this before it’s too late.
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This planet Earth is our only home and we need to protect it.

Level3 Unit3 Part1 Vocabulary - Forms of Life
Mammals are covered by hair or fur, have a backbone and are warm-blooded.
All female mammals produce milk for their young.
Reptiles are covered by scales and include snakes, lizards and turtles.
Reptiles have a backbone and are cold-blooded, which means they often rely on
external sources of heat.
Birds are covered by feathers and are warm-blooded.
Most birds can fly and many types of birds migrate great distances.
Most insects such as ants and bees have a small, 3-part body with 3-pairs of legs.
Some insects, like mosquitoes, spread diseases that cause the deaths of many humans.
Unlike animals, plants get the energy that they need from the sun.
Plants convert light energy, along with carbon-dioxide and water, into chemical
energy.

Level3 Unit3 Part1 Vocabulary – Instruments
Scales and rulers are used to measure weight and length.
Units of weight include kilograms and pounds, and units of length include centimeters
and inches.
These instruments are used to observe very large and very small objects.
Telescopes are used by astronomers, and microscopes are used by biologists and
doctors.
These appliances are used in the kitchens of almost every home.
Stoves are used to heat food and refrigerators are used to keep foods cool or cold.
Household tools like these are used to build and repair things.
Hammers are used to pound in nails and screwdrivers are used to turn a screw.
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Level3 Unit3 Part1 Dialogue - Dating Anniversary
Do you know what day it is today?
What do you mean?
Is it a special day?
Oh, so you don’t remember.
Remember what?
What’s so special?
It’s our anniversary.
We started dating a year ago today.
Oh, really? Sorry.

Just a minute.
What do you think this is?
Oh, it’s a necklace.
Do you like it?
Yes, I do.
It’s lovely, especially the red heart.
May I put it on?
No, let me do it.

So you did remember.
Of course I remembered.
It’s a very special day for both of us.
I have something for you too.
You do?
Yes, but it will have to wait until later.
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Oh, I can’t wait.
Tell me what it is.
(It's the first year anniversary of their first date.)

Can you guess what it is?
Could you give me a hint?
We went there six month ago.
Oh, you mean Alfredo’s.
Yes, aren't you excited?
You said you really liked the food there.
Yes, that’s true.
I also remember the dessert, do you?
Yes, but let’s not talk about that now.
Let’s not ruin the surprise.

Level3 Unit3 Part1 Dialogue - Fine Dining
That restaurant looks nice.
Yes, but it looks expensive.
Let’s go in and look the menu.
Wow, the menu looks great, especially the fish.
Yes, it looks good, but look at those prices.

Let’s try somewhere else.
Sometimes it’s okay to spend a little money.
Yes, but these prices are a bit too high, don’t you think?
Yes, they are a bit high.
But don’t you think I’m worth it?
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Let’s enjoy ourselves.
Ah, ok, if you put it that way.
Let’s see if we can get a table.
I’m glad you have your credit card.
I sure hope the food is good.
Stop worrying.
Let’s just enjoy.

Level3 Unit3 Part2 Listening - QuickServe 1
QuickServe is a home repair company.
It provides quick, reliable repair services to homes.
QuickServe handles plumbing and electrical issues 24 hours a day.
It also cleans roofs, fixes internet connections and replaces broken windows.
For a small fee, customers subscribe to the service.
Its main customers are the elderly, which means older people.
Whenever customers have a problem, they can call for help.
There is also a small service charge for each service call.

The company was established 5 years ago, and is growing rapidly.
It started in one city, but is now in 5 cities.
The company plans to expand to 10 cities within the next 24 months.
In each city, there is a small central office in a low-rent area of the city.
The central office handles the business, advertising, payroll and billing.
It also takes calls from customers, either online or by telephone.
It takes calls 24 hours a day, 7 days a week.

60% of the company’s employees work from their homes.
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When a customer calls in to central office, a service employee is contacted.
The service employee then contacts the customer and sets up an appointment.
These service employees are highly trained and provide excellent service.
In emergencies, such as a serious plumbing problem, service can be provided within
an hour.
One reason for this is that the service employees live in different parts of the city.
They are not centrally located, so it’s quicker and easier for them to travel to a
customer’s home.

Level3 Unit3 Part2 Listening - QuickServe 2
QuickServe has an excellent reputation.
Its prices are reasonable and its services are quick and efficient.
The company’s service employees are clean, polite and efficient.
In this type of business, person to person contact is the key to success.
With each satisfied customer, more customers subscribe.
Satisfied customers recommend QuickServe to their friends.
This kind of word-of-mouth advertising is very cost effective.
Cost effective means that the results are good without paying a high price.
In other words, quality service provides its own reward to the company.

The company takes great pride in being honest with its customers.
There are no hidden charges for their services.
As a result, the number of customers in each city is growing rapidly.
With the aging population, there are more elderly people who need home repair
services.
These people need to have confidence in the service provider.
They don’t want to be cheated.
These people don’t mind paying a reasonable fee for high quality service.
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High quality service should be rewarded.

The company provides a range of service plans, each with a different subscription
price.
The least expensive service plan is called the basic plan.
This plan provides non- emergency services with a very low service charge.
The most expensive service plan is their VIP plan.
The VIP plan provides emergency services 24 hours a day with no additional service
charge.
It also provides rebates to customers who don’t call for any service during the year.
In addition, QuickServe gives bonus points to customers for each year that they
subscribe.
These bonus points can be used to buy new appliances such as stoves and
refrigerators.

If the business continues to grow, the owners may decide to take the company public.
This means that the public can buy shares of the company.
It will then change from a privately-owned company to a public company.
The owners believe that their business is successful and can expand around the world.
They also believe that taking their company public can make them rich.


Level3 Unit3 Part2 Vocabulary – Sciences
Biology is the study of life, including its structure and evolution.
Biologists study how life survives and reproduces.
Chemistry is the study of matter, including the structure of atoms and molecules.
Chemists study how various substances interact with each other.
Astronomy is one of the oldest sciences.
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Astronomers study the structure and evolution of the universe, including the study of
stars, planets, and galaxies.
Geology is the study of the structure and history of the Earth and other planets.
Geologists study different types of rocks, earthquakes and the different layers of the
Earth.
Mathematics is the study of numbers, shapes, patterns and change.
Mathematics is used by all other branches of science.

Level3 Unit3 Part2 Vocabulary – Disasters
Here are some types of terrible events that hurt or kill people.
Earthquakes are caused by forces deep within the Earth.
During earthquakes, many people are often killed by collapsing buildings and bridges.
Floods happen when rivers rise and overflow their banks.
Floodwaters damage or destroy many houses and businesses.
Fires destroy buildings, land and forests.
There are many causes for fire, including lightning.
In a hurricane, high winds destroy buildings, and sometimes cause flooding.
Some hurricanes have winds of more than 200 miles an hour.
Car accidents happen when cars collide, or when drivers lose control of their cars.
One of the main causes of car accidents is driving too fast.

Level3 Unit3 Part2 Dialogue - Desk Assembly
What’s in that big box you are carrying?
It’s a new desk.
I just bought it and now I have to put it together.
Do you need any help?
No, I don’t think so.
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I just need to get my tools.
I’ll need a screwdriver and maybe a hammer.
Don’t forget to read the instructions.

How are things going?
I’m almost finished.
Something doesn’t look right to me.
The right side is higher than the left side.
Oh, you are right.
It looks like I put a couple of screws into the wrong places.

So now you'll have to take it apart.
Great. And I thought I was almost finished.
I told you to read the instructions.
Did you read them?
No, I didn’t read them.
I hate to read instructions.
I looked them, but they were confusing.
Well, this is what happens when you don’t.
You were too impatient.
Anyway, what can I do to help you?
Would you get another screwdriver and help me unscrew some of these screws?
OK, but next time please read the instructions.

Level3 Unit3 Part2 Dialogue - Life and the Universe
Do you ever look up at the sky and think about life and universe?
I did when I was a kid.
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But I don’t do that very much anymore.
Why do you ask?
Sometimes I feel like I'm lost in day-to-day details.
Then when I look up at the sky, I see the big picture.
I appreciate things more, even the little things.

You sound like a philosopher or a poet.
I felt like that too when I was a kid.
Don’t you feel like that anymore?
No, I don’t.
In fact, I try not to.
When I think about things too deeply, I get depressed.
It’s even a bit frightening.
Really? For me, it’s just the opposite.
Everything seems like a wonderful miracle.
Doesn’t that frighten you a bit?
The universe is so large and we are so small.

What I realize is how little we understand.
We just need to appreciate our lives and not get lost.
Sometimes being lost isn’t so bad.
Do you know the expression, ignorance is bliss?
Sure, I’ve heard it many times.
To be ignorant is to be happy.

Maybe it’s true.
Maybe it’s best not to think or know too much.
No, that’s not for me.
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