This radar is a kind of low frequency radar and is able to explore surface of Mars deep to several kilometers, thus it can get mass data about the undergroundconditions of Mars.
这种雷达是一种低频雷达，能够对几公里厚的火星表层进行探测，因而可以获得有关火星地下情况的大量数据。
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Francois Couder, 43, began working at the age of 17 laying underground cable in hazardous conditions for state-run France Telecom. The company has since been privatized.