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过程，植物将叶片中的水蒸气释放到大气中。

There's a lot of hot water vapour.

有很多热水蒸汽。

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袋子，这种袋子允许二氧化、氧气和水蒸气出入，但那些豆茎可能用来发送信号的大子物质，却无法通过。

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！大气中的水确实也在增加。

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时，它携带的水蒸气会凝结到该表上，形成无数微小的水滴。

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

最终产、氮气、水蒸气和其他多种气体，从而形成球的大气层。

It is generally accepted that when water vapour ascends in the process of cloud formation, it condenses onto dust particles.

人们普遍认为，在云的形成过程中，水蒸气上升，凝结在尘埃颗粒上。

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。

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，球表终于冷却到水蒸气变成液体的程度。

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。

Water vapour condenses to form clouds.

水蒸汽凝结成云。

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

火山喷出的水蒸气使得球内部的水得以流到表。

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水蒸气对大气窗口的影响。

The ice caps start to melt, releasing water vapour.

冰帽开始融化，释放出水蒸气。

In 1859, he analysed how infrared radiation, specifically, was absorbed by different gases, and found that gas produced by burning coal, which contained water vapour, methane and CO2, absorbed almost all the heat.

1859年，他析红外辐射是如何被不同气体吸收的，并发现由燃烧煤炭产的气体，其中含有水蒸气、甲烷和二氧化，几乎吸收所有的热量。

During colder times, the usual process of  evaporation of the oceans goes out of balance, with the resulting precipitation of this  water vapour accumulating as snow on expanding and deepening ice caps.

在较冷的时期， 海洋蒸发的正常过程会失去平衡，由此产的水蒸气会在不断扩张和加深的冰盖上积聚成雪。

The Hunga eruption did not throw anything like that much sulphur into the stratosphere, but it did pump in a great deal of water vapour, between 70 million and 150 million tons.

Hunga火山爆发并没有向平流层释放那么多的硫，但它确实注入大量的水蒸气，介于7000万到1.5亿吨之间。

Only two comets have had their water vapour measured for deuterium directly; 67P and  Halley's comet, and neither suggests that comets were the source of water on Earth.

只有两颗彗星的水蒸气中的氘被直接测量过，别是67P彗星和哈雷彗星， 但这两颗彗星都未显示出彗星是球水源的来源。

In 2020 the researchers reported that these capsules could capture more than double their weight in water vapour from ambient air when relative humidity was below 60%.

2020 年，研究人员报告说，当相对湿度低于 60% 时，这些胶囊可以从环境空气中的水蒸气中捕获两倍以上的重量。

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.

它是通过用电击水制造出来的，当你燃烧它时， 只会释放出水蒸气，这比从煤炭中获取氢气要好得多。