温度很少超过32华氏度，在这个温度下水会变成冰。

Temperatures seldom go above 32°F, at which water turns into ice.

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在火星上，当深处上升熔岩加热融化地下水冰时，基底侵蚀非常常见，因为这些地下水会流失，带走地下物质。

On Mars, subrosion is widely observed when rising magma heats frozen ground water, which melts and removes subsurface material as it flows away.

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地球上所有的地下水大约占淡水总含量的22%至30%，而冰占所有淡水的70%至78%。

Groundwater may constitute anywhere from approximately 22 to 30% of fresh water, with ice accounting for most of the remaining 78 to 70%.

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