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。

youdao

The scientists say their best explanation for this is the flow of salty water, possibly underground, although they say the findings don't provide direct evidence of water on Mars.

然而他们表示，该发现并不能提供火星上有水存在的直接证据。

youdao

But on Mars they would be living underground because the radiation - or light and heat - from the Sun would kill any organisms living on the surface of the planet.

但是在火星上也许它们要生活在地下，因为太阳辐射，或者说太阳的光和热会杀死火星表面所有的生物体。

youdao

Also on board Mars Odyssey is a neutron spectrometer that registers evidence for underground ice in the same regions of the planet.

BBC: Ice reservoirs found on Mars