慢速英语:Mars Rover Marks First Year on Red Planet

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短语讲解：

1. The United States space agency, NASA, says Curiosity has driven more than 1.6 kilometers on Mars.

more than 不只是
例句：More than 100 people were wounded.
爆炸还造成100多人受伤。

2. Space scientists chose to explore Mars instead of other planets because of the Red Planet’s similarities with our own.

because of 由于,因为
例句：We had attachment problems because of our attachment problems.
我们因我们有附件问题而有附件问题。

3. Knowing that Mars was an environment that was habitable in its past, we're going to start seeking the signs of potential life that could have existed on Mars.

be going to 要，会，将要
例句：They tend to be going to school.
他们都将去上学。

4. It will search for clues about how the planet has changed over time.
 
search for 搜索，搜寻
例句：The unemployed will search for jobs online.
失业者可以在网上寻找工作。