... selenium pollution硒污染 self cleaning capacity自净能力 self excitation自激 ...
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self-cleaning capacity 自净能力
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The river side pollution will become more serious because of the slow down of river velocity, though the water quantity and self-cleaning capacity increase.
由于水体加大，水流减缓，水环境总体纳污能力增加，但岸边污染将趋严重。
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