七年级时文阅读第二十六篇

原文：

Evolution is not perfect

进化外研高中英语教案下载，不完美的旅程

Over the past billions (数十亿) of years, many animals and plants have lived on this beautiful planet. But about 99.9 perfect of them died out. This is because they couldn’t adapt to (适应) where they lived. To survive, living things must change over time. This is called “evolution”.

When reading this article, please remember that every one of us is a lucky dog. We evolve (进化), and we survive! After years of evolution, now we have the abilities (能力) to live in the world and enjoy it. Just like humans, other animals on Earth also evolve great abilities. For example, giraffes live on the grasslands of Africa. To adapt to life there, they have evolved longer necks to reach the high trees, as well as longer legs to run away from lions and cheetahs (猎豹).

However, evolution also gives giraffes a strange habit: They only sleep for about 30 minutes a day and less than 5 minutes a time. And they sleep standing! Why are they so wakeful? Well, that’s because they are so tall. They need longer time getting off the ground and run. Because of this unique sleep style, they won’t become easy meals for others.

As you see, evolution isn’t always perfect. It helps animals to live. But it sometimes also gives them what they don’t really want. Don’t feel sorry. It’s part of natural selection (自然选择). In order to survive, all of this is reasonable.

无注释版

Evolution is not perfect

Over the past billions of years, many animals and plants have lived on this beautiful planet. But about 99.9 perfect of them died out. This is because they couldn’t adapt to where they lived. To survive, living things must change over time. This is called “evolution”.

When reading this article, please remember that every one of us is a lucky dog. We evolve, and we survive! After years of evolution, now we have the abilities to live in the world and enjoy it. Just like humans, other animals on Earth also evolve great abilities. For example, giraffes live on the grasslands of Africa. To adapt to life there, they have evolved longer necks to reach the high trees, as well as longer legs to run away from lions and cheetahs.

However, evolution also gives giraffes a strange habit: They only sleep for about 30 minutes a day and less than 5 minutes a time. And they sleep standing! Why are they so wakeful? Well, that’s because they are so tall. They need longer time getting off the ground and run. Because of this unique sleep style, they won’t become easy meals for others.

As you see, evolution isn’t always perfect. It helps animals to live. But it sometimes also gives them what they don’t really want. Don’t feel sorry. It’s part of natural selection. In order to survive, all of this is reasonable.

译文：

Evolution is not perfect

进化并不完美

Over the past billions of years, many animals and plants have lived on this beautiful planet.

在过去的数十亿年里，许多动物和植物生活在这个美丽的星球上。

But about 99.9 perfect of them died out.

但是大约99.9个完美的物种灭绝了。

This is because they couldn’t adapt to where they lived.

这是因为它们无法适应它们生活的地方。

To survive, living things must change over time.

为了生存，生物必须随着时间的推移而改变。 T

his is called “evolution”.

这被称为“进化”。

When reading this article, please remember that every one of us is a lucky dog.

阅读这篇文章时外研高中英语教案下载，请记住我们每个人都是幸运的。

We evolve, and we survive!

我们进化，我们生存!

After years of evolution, now we have the abilities to live in the world and enjoy it.

经过多年的进化，现在我们有能力生活在这个世界上并享受它。

Just like humans, other animals on Earth also evolve great abilities.

和人类一样，地球上的其他动物也进化出了强大的能力。

For example, giraffes live on the grasslands of Africa.

例如，长颈鹿生活在非洲的草原上。

To adapt to life there, they have evolved longer necks to reach the high trees, as well as longer legs to run away from lions and cheetahs.

为了适应那里的生活，它们进化出了更长的脖子来攀爬高高的树，以及更长的腿来躲避狮子和猎豹。

However, evolution also gives giraffes a strange habit: They only sleep for about 30 minutes a day and less than 5 minutes a time.

然而，进化也给了长颈鹿一个奇怪的习惯:它们每天只睡大约30分钟，每次不超过5分钟。

And they sleep standing! 他们站着睡觉! Why are they so wakeful?

他们为什么这么清醒?

Well, that’s because they are so tall.

那是因为他们太高了。

They need longer time getting off the ground and run.

他们需要更长的时间从地面起飞和运行。

Because of this unique sleep style, they won’t become easy meals for others.

因为这种独特的睡眠方式，它们不会成为别人容易吃的食物。

As you see, evolution isn’t always perfect.

正如你所看到的，进化并不总是完美的。

It helps animals to live.

它帮助动物生存。

But it sometimes also gives them what they don’t really want.

但有时也会得到他们不想要的东西。

Don’t feel sorry. 不要感到难过。

It’s part of natural selection. 这是自然选择的一部分。

In order to survive, all of this is reasonable.

为了生存，这一切都是合理的。