同时，潮湿环境中的昆虫失去的身体重量也较少，可能是因为蒸发减少了。看来，这些蟑螂通过屏住呼吸来维持湿度。

They also lost less body mass, a possible sign of reduced evaporation. The roaches, it seems, hold their breath to stay wet.

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当冰河时代开始时，大陆上的冰原逐渐增大，从海洋中蒸发出来的水逐渐减少，而这些水最终又会回到陆地上。

When an ice age begins, the continental ice sheets grow, steadily reducing the amount of water evaporated from the ocean that will eventually return to it.

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这样一来，帮助云层形成的水分减少，没有什么可以蒸发以形成云层。

Then you have less moisture to help clouds form, nothing to evaporate for cloud formation.

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