If a stratum of air saturated with moisture meets a very cold one, the fog begins to freeze, and becomes specks of snow.
如果含水量达到饱和状态的空气遇到了非常冷的另一团空气，空气中的原先呈雾状的水分就开始凝结变成小的雪粒。
Compressed air is hot and saturated with moisture when it leaves the air compressor.
压缩空气如果离开空气冷却机就会变得很热，很潮湿。
During a fog, the air is saturated with moisture.
下雾时空气被湿气浸透。
During a fog, the air is saturated with moisture.
下雾时空气被湿气浸透。
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