说热空气“持有”更多的水分在技术上是不正确的,但是是一种常见的口语。让我们将其分解技术。让我们考虑一杯水和一个真空(没有空气)上面。会发生什么呢?最顶部的分子层的水会蒸发。以什么速度将水蒸发?更好的是,蒸发是什么?蒸发是当水分子获得足够的动能(他们振动速度)将持有的债券。动能是依赖于温度。所以分子振动速度,打破他们的债券,并进入真空蒸汽。 Some molecules will stay as a vapor in the vacuum, but others will reenter the liquid. When the molecules enter the liquid as fast as they are leaving, then it is saturated. Note that I specifically said it is a vacuum. Instead of a glass of water, picture the water as little drops. The atmosphere can act to warm or cool these drops, and vice-versa.