The controlled ventilation moves the outside air over an earth register, and thus enables it to warm up the cold outside air but also to cool down the hot air.

通过控制通风系统使外部空气在一个固定装置中移动，从而使它加热了寒冷的室外空气并且冷却热空气。

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The controlled ventilation moves the outside air over an earth register, and thus enables it to warm up the cold outside air but also to cool down the hot air.

通过控制通风系统使外部空气在一个固定装置中移动，从而使它加热了寒冷的室外空气并且冷却热空气。

youdao