第三模块第二单元翻译word版本

第三模块第二单元翻

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Unit 2

We have not found life on any other planets yet.

我们还没有在其他行星上发现生命。

Scientists think that there has been life on earth for hundreds of millions of years. However, we have not found life on any other planets yet.

科学家认为亿万年以前地球上已有生命存在了。然而，我们还没有在任何其他行星上发现生命。

The earth is a planet and it goes around the sun. Seven other planets also go around the sun.

地球是颗行星，它绕着太阳转。其他七颗行星也绕着太阳转。None of them has an environment like that of the earth, so scientists do not think they will find life on them.

这些行星没有一颗像地球那样的环境，因此科学家们认为他们不会在它们上面发现生命。

The sun and its planets are called the solar system, and our solar system is a small part of a much larger group of stars and planets, called the Galaxy or the Milky Way.

太阳和它的行星被叫做太阳系，我们的太阳系是一个由恒星和行星组成的更大的星群里的一小部分，这个星系叫银河系，或者银河系。

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