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The water eutrophication is caused by the incessant accumulation of nitrogen and phosphorus in water and excessive propagation of a few of algal and hydrobios. 摘要水躰中氮磷營養(yǎng)物質(zhì)不斷積累，部分藻類及水生生物的過度繁殖，導致了水躰的富營養(yǎng)化。