-
腿
Level 3
·
Unit 3
莆
Part
·
1
Listening
袄
Life & Conditions 1
螂
There are many forms of life on Earth, including human beings.
薇
地球上有多种形式的生命，包括人类。
膅
Life exists in a variety of conditions.
生命存在于各种各样的环境中。
袄
Some forms of life live in a watery environment, like the oceans.
衿
有些生物生活在水环境中，比如海洋。
芈
Other forms of life can be found in very dry areas like deserts.
羃
在非常干燥的地区，如沙漠，也可以找到其他形式的生命。
羄
However, for any form of life to exist, conditions must be right.
艿
然而，任何形式的生命存在，条件必须是正确的。
螆
When conditions are not right, that form of life will become extinct.
羆
当情况不佳时，这种形式的生命就会灭绝。
肄
To become extinct means to die out completely.
蚀
灭绝意味着完全灭绝。
蒈
Conditions must be right for life to exist.
螅
环境必须是生命存在的权利。
膄
Millions of years ago there were forms of life that no longer exist.
肁
数百万年前，有些生命形式已经不复存在。
羆
When conditions changed, these forms of life died out.
蒄
当条件改变时，这些形式的生命就消失了。
芃
One extinction event happened about 250 million years ago.
芈
一次灭绝事件发生在大约
2.5
亿年前。
蚈
This was the largest extinction event of all time.
蒁
这是有史以来最大的一次物种灭绝事件。
薁
Many forms of life became extinct.
袇
许多形式的生命都灭绝了。
芄
Ninety six percent of all life in the oceans died out.
薄
海洋中
96%
的生命都灭绝了。
蚁
Most insects also became extinct.
大多数昆虫也灭绝了。
芈
This event happened over a period of several million years.
羅
这件事发生在几百万年的时间里。
芃
The causes of this extinction event are still unknown.
蚁
这种灭绝事件的原因尚不清楚。
蚈
Possible causes include large volcanic eruptions and global warming.
蒃
可能的原因包括大规模的火山爆发和全球变暖。
肁
Some scientists believe that there were several causes.
螁
一些科学家认为有几个原因。
聿
They believe that a series of events caused the extinctions.
膅
他们认为一系列事件导致了物种灭绝。
肄
Scientists are working to better understand what really happened.
袁
科学家们正在努力更好地了解到底发生了什么。
膆
Listening
Life & Conditions 2
袇
I
n modern times we humans face changing conditions.
袃
在现代，我们人类面临着不断变化的环境。
羁
For humans to live, we need clean air and clean water.
薇
为了人类生存，我们需要干净的空气和清洁的水。
莅
Pollution is now a growing problem around the world.
蚂
在世界各地，污染现在是一个日益严重的问题。
肀
Pollution poisons the air and water that we depend on.
羈
污染毒害了我们赖以生存的空气和水。
肇
Polluted air makes people sick and afraid to go outside.
莁
污染的空气使人们生病，不敢出门。
膀
Polluted water poisons our food supply.
荿
被污染的水毒害了我们的食物供应。
薅
As a result, we never know which foods are safe to eat.
蒄
因此，我们永远不知道哪些食物是安全的。
芀
Human beings cannot live in a poisoned environment.
薆
人类不能生活在有毒的环境中。
芇
Therefore, pollution is a major threat to our existence.
膃
因此，污染是对我们生存的主要威胁。
芀
Humans need temperatures to be in a comfortable range.
羇
人类需要温度在一个舒适的范围内。
蚄
To be in a comfortable range means to be neither too hot nor too cold.
羂
在舒适的范围内意味着既不太热也不太冷。
莀
With global warming, global temperatures are rising.
莇
随着全球变暖，全球气温正在上升。
莆
As temperatures rise, the polar icecaps will melt.
羄
随着温度的升高，极地冰盖将融化。
蒀
As the polar ice caps melt, ocean levels will rise.
螈
随着极地冰帽的融化，海平面将会上升。
袄
Areas of some countries will soon be under water.
螃
一些国家的一些地区很快就会被淹没。
薀
People will be forced to relocate from flooded areas.
腿
人们将被迫从洪灾地区搬迁。
薆
In nature, even small changes can sometimes have large effects.
薂
在自然界中，即使是很小的变化有时也会产生很大的影响。
虿
It's difficult to predict what's going to happen.
芆
很难预测会发生什么。
肄
The entire ecosystem that we depend on is changing.
芁
我们所依赖的整个生态系统正在发生变化。
蝿
Some of these changes are irreversible.
其中一些变化是不可逆的。
蚇
Irreversible changes cannot be undone.
不可逆的变化是不可撤销的。
螆
Let's
hope that
humans
are
smart
enough
to
understand
how
the
world
is
changing.
让我们希望人类足够聪明，能够理解世界是如何变化的。
莄
With more understanding, we can make better choices about what to do.
衿
有了更多的理解，我们可以更好地选择做什么。
肈
We can face the challenges of pollution and global warming.
膄
我们可以面对污染和全球变暖的挑战。
膃
We need to do this before it's too late.
衿
我们得趁现在还来得及这么做。
葿
This planet Earth is our only home and we need to protect it.
羆
地球是我们唯一的家园，我们需要保护它。
袂
Irreversible changes cannot be undone because they cannot be reversed.
罿
Human beings cannot live in a poisoned environment.
袀
不可逆的变化不能撤消，因为它们不能被逆转。
人类不能生活在有毒的环境中。
莃
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