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释放大中。

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了袋子，这种袋子允许二氧化碳、氧和水蒸出入，但那些豆茎可能用来发送信号的大分子物质，却无法通过。

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.

潮湿的触比自身更冷的表时，它携带的水蒸会该表上，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.

最终产生了碳、氮、水蒸和其他多种体，从而形成了地球的大层。

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，水蒸上升，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%的相对湿度意味着中含有尽可能多的水蒸。

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，地球表终于冷却水蒸变成液体的程度。

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中，由于水蒸很轻，所以冷会上升。

Water vapour condenses to form clouds.

水蒸汽成云。

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

火山喷出的水蒸使得地球内部的水得以流地表。

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建筑间来测试不同污染物和水蒸对大窗口的影响。

The ice caps start to melt, releasing water vapour.

冰帽开始融化，释放出水蒸。

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，他分析了红外辐射是如何被不同体吸收的，并发现由燃烧煤炭产生的体，其中含有水蒸、甲烷和二氧化碳，几乎吸收了所有的热量。

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，由此产生的水蒸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，但它确实注入了大量的水蒸，介于7000万1.5亿吨之间。

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中的氘被直测量过，分别是67P彗星和哈雷彗星， 但这两颗彗星都未显示出彗星是地球水源的来源。

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中的水蒸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，这比从煤炭中获取氢要好得多。