All of them spend most of their life underground.

他们一生中大部分时间都在地下度过。

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The problem is that if life exists elsewhere in the solar system it must be living underground on places like Mars, Europa, and Enceladus.

问题是如果有生命存在在太阳系的其它地方，那他一定是生活在像火星，欧罗巴和恩克拉多斯的地下。

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FOR many commuters, the London Underground provides a welcome refuge from the deluge of e-mails, text messages, phone calls and the like that characterise life in the 21st century.

对许多上班族来说，伦敦地铁为他们提供了一个可喜的“避难所”，使他们远离那些充斥在21世纪生活中的电子邮件，短信，电话及诸如此类。

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Having fed on root sap during their underground life, mature cicadas have no need to eat and indeed no mouths.

ECONOMIST: Cicadas in Illinois

Within minutes of leaving the hotel grounds and the life-sustaining underground aquifers, we were surrounded by a landscape that couldn't sustain a shrub.

WSJ: Staying at Adr��re Amellal in Siwa, Egypt

Our program was looking as all aspects of underground life in Paris and in the process of researching it we also came across another extraordinary group who put the subterranean spaces to new uses.

CNN: Bone people: The explorers of the Parisian catacombs