Due to wide applications of fertilizers and pesticides, agricultural non-point sources has been the key pollution source of water environment in China.
由于化肥和农药的大量使用，农业非点源已成为中国水环境的主要污染源。
The surface pollution control of city water source is the key to ensuring safety of drinking water.
城市饮用水源地面源污染的控制是确保饮水安全的关键环节。
Silica gel production is high water consumption industry and silica gel wastewater has always been a key source of pollution in the field of industrial production.
硅胶生产属于高耗水行业，硅胶废水也是工业生产领域的一个重要污染源。
This paper mainly introduces the control method of hydraulic system's pollution source and the key of control skill, and provides important reference for actual work in future.
文章介绍了液压系统污染源的控制方法和关键控制技术的应用，可为今后的实际工作提供重要的帮助。
The pollution situation of the virulent organic pollutant in the key water source area of Fuxin has been investigated and analyzed in this paper.
调查分析了阜新市重点水源受有毒有机污染物的污染状况。
However, the coking, as the key industry of our country's national economy, is an open source of pollution. The pollutant it sends out has brought great harm to people's health.
炼焦作为我国国民经济的重点行业，却是一个开放性的污染源，它散发的污染物给人们的健康带来了很大危害。
However, the coking, as the key industry of our country's national economy, is an open source of pollution. The pollutant it sends out has brought great harm to people's health.
炼焦作为我国国民经济的重点行业，却是一个开放性的污染源，它散发的污染物给人们的健康带来了很大危害。
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