Mars is the only other planet that once had water on its surface – which is why scientists are looking for signs of life there.
除地球以外，火星是唯一的另一个存在表层水的行星。为此，科学家正在那里寻找生命的迹象。
For example, scientists have found evidence that there could be liquid water-which is necessary for life on earth-at many places on the Mars.
他说，比如，科学家曾经在火星上的很多地方发现曾有液态水存在的证据，而这是生物生存的必要条件。
There is water ice on Mars within reach of the Mars Phoenix Lander, NASA scientists announced Thursday.
NASA的科学家在周四宣布：在凤凰号火星车触手可及的地方发现了水冰。
Discovering water on Mars was not quite as significant because the major hurdle to establishing permanent settlements there is the eight-month journey.
火星上发现水完全没有如此重要意义，因为在火星上建立永久定居点的主要障碍是路途时间，单片行程就有8个月之久。
There is plenty of ice on Mars, but the chemical reactions for life come to a halt when water freezes.
在火星上有大量的冰块，但是当水结冰时，形成生命的化学反应就会停止。
Absolutely! It says there is water on Mars buried beneath the surface. It's just a matter of how deep it is.
报道中说火星的地下埋藏着水。只不过是一个深浅的问题。
Absolutely! It says there is water on Mars buried beneath the surface. It's just a matter of how deep it is.
报道中说火星的地下埋藏着水。只不过是一个深浅的问题。
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