英语翻译Surface Water ContaminationWhat kind of contamination is

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英语翻译
Surface Water Contamination
What kind of contamination is it?
Surface water is usually rain water that collects in surface water bodies,like oceans,lakes,or streams.Another source of surface water is groundwater that discharges to the surface from springs.Surface water pollution occurs when hazardous substances come into contact and either dissolve or physically mix with the water.Because of the close relationship between sediments and surface water,contaminated sediments are often considered part of surface water contamination.Sediments include the sand and soils on the bottom of an ocean,lake,or stream.

地表水污染物
它是什么类型的污染物呢?
地表水体包括海洋、湖泊、溪流等,通常由雨水汇流而成,另一个来源则是泉涌而出的地下水.当有危险物质进入水体流通并在水中溶解混合的时候,地表水污染就产生了.鉴于沉积物与地表水之间的紧密联系,往往将沉积物污染作为地表水污染的一部分.沉积物包含海洋、湖泊以及溪流底部的泥和沙.
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