One way for human missions to Mars is to set up a base on the moon to be used as a steeping-stone.
把人类送上火星进行探测的一种方法，是在月球上建立一个基地，用来作踏脚石。
The smooth Snow Queen feature is strongly suspected to be ice originally just under the soil, uncovered by the thruster rockets as Phoenix set down on the north polar plains of Mars.
因为冰后具有很平滑的表面，这也让大家很怀疑它本来是位在表土之下，当凤凰号降落在火星北极平原时，被火箭的喷气给清出来。
By now, a rocket will have set off on its 35 million mile trip to Mars and scientists must be waiting anxiously for the results.
现在，一枚火箭可能已经开始了它的三千五百万英里的火星之行，科学家们一定在焦急地等待着结果。
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