地下水位可能仅在地面之下，这使得隧道变得十分不可行。

The water table was probably just below the surface making tunnels highly unlikely.

youdao

地面之上，高墙之下。

That, over the floor and down the wall.

youdao

那里的地面温度符合使二氧化碳冰冻的温度，但在那之下是否还潜伏著水冰？

Its surface temperature matches that of carbon dioxide ice, but might water ice lie underneath?

youdao

那里的地面温度符合使二氧化碳冰冻的温度，但在那之下是否还潜伏著水冰？

Its surface temperature matches that of carbon dioxide ice, but might water ice lie underneath?

youdao