There's a lot of hot water vapour.

有很多热水蒸汽。

Researchers discovered that in tropical atmospheres, cold air rises because of the lightness of water vapour.

研究人员发现在热带大气中，由于水蒸气很轻，所以冷空气会上升。

In short, as part of the process of photosynthesis plants release water vapour from their leaves into the atmosphere.

简单来说就是光合作用的一部分过程，植物将叶片中的水蒸气释放到大气中。

About 3.8 billion years ago, Earth's surface had finally cooled to the point that water vapour turned to liquid.

大概在三十八亿年前，地球表面终于冷却到水蒸气变成液体的程度。

A relative humidity of 100% means the air in question is holding as much water vapour as it possibly can.

100%的相对湿度意味着空气中含有尽可能多的水蒸气。

They were in time to produce carbon, nitrogen, water vapour and other gases, which were to make the earth's atmosphere.

最终产生了碳、氮气、水蒸气和其他多种气体，从而形成了地球的大气层。

The ice caps start to melt, releasing water vapour.

冰盖开始融化，释放出水蒸气。

Water vapour, like carbon dioxide, is a greenhouse gas.

水蒸气和二氧化碳一样，是一种温室气体。

It's derived from water, and when you burn it, it only emits water vapour.

它来自水，当你燃烧它时， 它只会散发出水蒸气。

When humid air hits a surface colder than it is, the water vapour it carries condenses onto that surface as myriad tiny droplets.

潮湿的空气接触到比自身更冷的表面时，它携带的水蒸气会凝结到该表面上，形成无数微小的水滴。