There's a lot of hot water vapour.

有很多热蒸汽。

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

人员发现在热带大气中，由于蒸气很轻，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%的相对湿度味着空气中含有尽可能多的蒸气。

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、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，释放出蒸气。

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

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，燃烧它时， 它只会散发出蒸气。

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，它携带的蒸气会凝结到该表面上，形成无数微小的滴。

The water vapour spat out by the volcanoes allowed the water trapped in the Earth's bowels to make its way to the surface.

火山喷出的蒸气使得地球内部的得以流到地表。

The idea is to test the effects on the atmospheric window of various pollutants, and also of water vapour, by releasing them into the building.

其想法是把激光束释放到建筑空间来测试不同污染物和蒸气对大气窗口的影响。

It's made by zapping water, using electricity, and when you burn it, it just emits water vapour, which is way better than getting hydrogen from coal.

它是用电加热制成的，燃烧它时， 它只会散发出蒸气，这比从煤中获取氢气要好得多。

But that can't be due to human activity. The only way for the atmosphere to hold more water vapour is if it gets warmer. So... Hang on, you're not saying...

还早呢！大气中的确实也在增加。

It was one of the biggest eruptions since that of Mount Pinatubo in the Philippines in the 1990s and injected an estimated 146 million tonnes of water vapour into the stratosphere.

这是自 1990 年代菲律宾皮纳图博火山爆发以来最大的火山爆发之一，估计向平流层注入了 1.46 亿吨蒸气。

Five weeks after the experiment began, all the plants were covered by bags that allowed carbon dioxide, oxygen and water vapour in and out, but stopped the passage of larger molecules, of the sort a beanstalk might use for signalling.

五周过后，实验人员给所有的蚕豆都罩上了袋子，这种袋子允许二氧化碳、氧气和蒸气出入，但那些豆茎可能用来发送信号的大分子物质，却无法通过。