One of the most powerful of all weather systems, hurricanes are powered by the heat energy released by the condensation of water vapour.

作为所有天气系统中最强大的系统之一，飓风是由水蒸气凝结释放的热能所驱动的。

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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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A cloud is a condensation of water vapour.

云是由水蒸汽凝缩而成的。

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Such particles act as nuclei for the condensation of water vapour into the droplets of which clouds are composed.

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While that argument makes the alarmist blogs and MSNBC, it neglects that, everything else being equal, if hurricanes are becoming rainier, they must be getting stronger, as the fuel that drives the kinetic whirl of the tropical cyclone is the heat released by the condensation of water.

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The consequent condensation of the water vapour it is carrying heats the air further (the change of state from gas to liquid sheds latent heat), causing it to continue rising.

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