土地平整了，有水渠控制水量，这样的问题就不再发生了。
With the fields levelled and irrigation channels controlling the volume of water, no such problem arose again.
在肯尼亚东部的基图伊，尘土弥漫的田地里，农民们正学着建造小型的环形土坝，以此控制水量、减缓水分流失。
In a dusty field in Kitui, eastern Kenya, farmers are being taught how to construct small, semi-circular barriers of earth that control the flow of water, slowing its run-off.
由于湖泊水位是由蒸发率和降水量控制的，对这种水位的解释是模糊不清的。
Since lake levels are controlled by rates of evaporation as well as by precipitation, the interpretation of such levels is ambiguous.
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