Solar reflectors on the roof heat water passing through a series of metal tubes. The hot water than pumped to a storage tank in the building and ready for use.
屋顶上的太阳能反射板将流经一系列金属管的水加热，加热的水再泵入一个室内的储水箱备用。
Every apartment house has a water tank on its roof.
每栋公寓房子都有一个水塔。
Rows of trees which have been planted are irrigated by an underground reservoir that relies on rain water, which is collected from the roof of the building and stored in a tank.
树木成排种植，依靠由建筑屋顶所收集的雨水，之后储存于地下罐中积存下的水来灌溉。
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