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。
A cloud is a condensation of water vapour.
云是由水蒸汽凝缩而成的。
Humidification: Addition of water vapour to air.
加湿：在空气内加入水气。
Water vapour concentrations are always variable, but are roughly 1%.
水蒸汽的浓度总是变量，但大约1%。
When temperature is lower, water vapour in the air, humidity decrease.
当温度降低时，空气中的水蒸气饱和度降低，湿度减小。
The higher the temperature of the air, the more water vapour it can absorb .
空气的温度越高，它能吸收的水蒸汽就越多。
But this ignores the fact that the level of water vapour depends on temperature.
但这说法忽略了水气的多寡是取决于温度这事实。
But this ignores the fact that the level of water vapour depends on temperature.
但是，这类人忽略了一个事实，即温度决定了水蒸气的水平。
When(water is) heated, water is turned into vapour.
水加热时变成气体。
How can the water become vapour?
水怎样变成水蒸气？
The sun shines and the water in the river become vapour.
阳光闪耀，河流中的水化作蒸汽。
If it is very hot, water can become vapour.
如果天很热，水能变成蒸气。
The water droplets change back to vapour and rise up.
水滴重新变成水蒸气上升到空中。
When heated, water change into vapour.
的翻译是：加热时，水变成蒸汽。
Heating water, we can change it into vapour.
给水加热，我们可以将其变成水蒸气。
Water can change from liquid state into ice or vapour.
如果进行冷冻的话，水会由液态变为固态。
Fresh Water, Waste Water, Sea Water, Vapour, Gas, Oils, Acid and Alkaline.
淡水、污水、海水、蒸汽、煤气、各种油品、各种酸碱。
Fresh Water, Waste Water, Sea Water, Vapour, Gas, Oils, Acid and Alkaline.
淡水、污水、海水、蒸汽、煤气、各种油品、各种酸碱。
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