We mentioned earlier, that cooling the air reduces its ability to hold water, and triggers the formation of water droplets.

我们之前说过，给空气降温会减少空气中的水蒸气含量，从而形成水滴。

But, essentially, instead of heating up or cooling down the air in our homes, a heat pump just kind of moves hot and cold air around to where you want it.

但是，从本质上讲，热泵不是加热或冷却我们家中的空气，而是将冷热空气移动到您想要的地方。

Clouds form when saturated air reaches  its dew point, the temperature at which, under a given set of barometric conditions, water  vapour condenses into liquid due to cooling air or increased saturation from an adjacent water  source.

当饱和空气达到露点时， 云就会形成。露点是在给定的气压条件下，水蒸气由于冷却空气或邻近水源饱和度增加而凝结成液体的温度。