An air-conditioning unit outside the house or building runs USES electricity to cool the air and then sends into the building through openings in the rooms of the buildings.

室外的一个空调装置则使用电力将空气的温度下降，下降的空气通过房间的通道送往整栋大楼。

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Because cooler air has a higher density (greater mass per unit volume), cold air intakes generally work by introducing cooler air from outside the hot engine bay.

因为冷气流密度较高(更大的质量单位体积内)，冷空气引入采一般的工作从外面冷空气热引擎湾。

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