如果管理得当，湿地可以帮助防止非点，有辱人格的水质污染源。
When properly managed, wetlands can help prevent non-point source pollution from degrading water quality.
因此，对控制这些湖泊的水质富营养化而言，控制氮沉降并不是目前最紧迫的任务，而其它人为污染源的控制才是最急需的。
As a result, to control water eutrophication of these lakes, it is not most urgent to control nitrogen deposition but to control the other sources of nitrogen pollution mentioned above.
污染物总量控制的技术关键是污染源与水质目标之间的响应关系。
The technical key of total emission control is the response relationship between pollution sources and water quality object.
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