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It was China's first Mars program to make scientific researches about the soil, environment, atmosphere, water and so on.

这是中国第一个对土壤、环境、大气、水等进行科学研究的火星计划。

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He thinks sending people to Mars will allow us to learn a lot of things—for example, the ability of humans to live in a very different environment.

他认为将人类送上火星会让我们学到很多东西，比如人类在一个大不相同的环境中生存的能力。

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And, for those space-cadets who still dream of a manned mission to the planet, there is also the Mars radiation environment experiment.

ECONOMIST: Mars Odyssey

The mission of the mobile science laboratory is to determine whether Mars ever had an environment capable of supporting life.

CNN: Mars rover captures nearby rocket 'footprint'

The rover's mission is to determine whether Mars ever had an environment capable of supporting life, and its prime target is Mount Sharp, the 18, 000-foot (5, 500-meter) peak about 12 kilometers (7.5 miles) to the south.

CNN: Mars panorama shows Curiosity's prime target