To protect the stamps, some people also put the stamps into a special room which has a machine to keep the air cool and dry.

为了保护邮票，一些人也把邮票放在有机器保持空气凉爽和干燥的特殊房间里。

youdao

On clear winter nights, the ground and overlying air cool off rapidly, especially at high elevations.

在冬季晴朗的夜晚，地面和上方的空气迅速冷却，在高海拔地区更加明显。

youdao

However, for a while the land around the city acted as a natural air conditioner, keeping the air cool through evaporation of moisture from the ground.

不过，有一段时间，莫斯科市周围的土地起到了自然空调的作用，通过从地面蒸发湿气保持空气凉爽。

youdao

You are up high, so even in the summer the air usually is cool.

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That means, of course, that more of the power being delivered to the facility is being used in computing, less to keep the lights on and the air cool.

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But burning less oil to keep air cool so ice stays ice and the seas don't warm is too expensive and roundabout a way to meet the danger, Mr Mendelsohn thinks.

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Turning blades of the turbines mix up this air, cool with warmer, and thus lower the temperature of the higher up air.

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