这是个悖论，孤独只在孤独中存在。一旦分享出来，它就蒸发了。
It's a paradox. Isolation only exists in isolation! Once Shared, it evaporates.
简单地说，如果气体分子达到逃逸速度，它就能从一颗行星上“蒸发”。
Simply stated, a gas molecule can "evaporate" from a planet if it reaches a speed known as the escape velocity.
此外，如果水冰与岩石和灰尘混合在一起，它就不会蒸发掉。
Furthermore, if the water ice was mixed in with rock and dust, it would be protected from evaporation.
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