Today many homes use solar energy for space heating. There are two general types of solar space heating systems: passive and active.
如今许多的家庭都采用太阳能供暖，其中有两种普遍的太阳能供暖形式：积极供暖与消极供暖。
Active solar energy systems can also be used to provide space heating in buildings.
主动式太阳能系统还可以用来提供建筑中的室内供暖。
Active solar energy systems can also be used to provide space heating in buildings.
主动式太阳能系统还可以用来提供建筑中的室内供暖。
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