本文分析指出，地面沉降现象可用地下抽水作用引起土层内应力重分布和由此导致的变形作合理的解释。
Analysis shows that the phenomena of land subsidence can be well interpreted by stress redistribution and its consequent deformation occurred in the soil layer as a result of subterranean pumping.
我国目前大量的泵站在国民经济中承担着农业抽水灌溉、城市供水排水等任务，发挥着巨大的作用。
A large number of pump stations undertake the tasks of agriculture pumping irrigation, urban water supply and drainage and play the important role in the national economy of China.
风车最主要的用途是磨粉，在某些地区用于灌溉土地和抽水，其作用也同样重要。
Their most important traditional use was for grinding grain, though in certain areas their use in land drainage and water pumping was equally important.
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