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Water vapour condenses to form clouds.
水蒸汽冷凝形成云。
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I have moved from trying to model and understand the distribution and evolution of water vapour.
我已经不再试图构建和理解水汽的分布和演变的理论模式了。
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A cloud is a condensation of water vapour in the atmosphere.
云是由大气中的水蒸气凝结成的。
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The feasibility of preparation of particulate activated carbon from char of cocoa nut husk by water vapour microwave was studied.
研究了以椰壳炭化料为原料，采用水蒸气微波法制备颗粒活性炭的可行性。
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Clouds are formations of condensed water vapour.
云是由凝聚的水蒸气构成的。
1. 水蒸气，简称水汽，是水（H2O）的气体形式。当水达到沸点时，水就变成水蒸气。在海平面一标准大气压下，水的沸点为99.974°C或212°F或373.15°K。当水在沸点以下时，水也可以缓慢地蒸发成水蒸气。而在极低压环境下（小于0.006大气压），冰会直接升华变水蒸气。水蒸气可能会造成温室效应，是一种温室气体。