The pollution of ammonia nitrogen is serious year by year in inner-river and becomes the main pollution factor though its concentration varies with different seasons.
内河涌的氨氮污染逐年严重，并呈现季节性的变化，已成为最主要的污染因子。
The water equilibrium analysis method is simple and easy to be operated. It can provide the reference for establishing energy equilibrium and pollution factor equilibrium.
清水、污水平衡分析方法简单可靠，易于实施，同时可以为能量平衡、污染因子平衡的建立和分析提供借鉴和参考。
It also showed that in each pollution factor, COD, BOD5 and the votile phenol contributed much more to the water quality of this river. Thus corresponding reason was analyzed.
在各污染因子中COD、BOD5、挥发酚类对河流水质的贡献率较大。由此分析了相应的原因。
The SO2 pollution caused by coal-combustion has become the most main pollution factor in atmospheric environment.
由燃煤引起的二氧化硫污染已成为大气环境中最主要的污染因子。
The SO2 pollution caused by coal-combustion has become the most main pollution factor in atmospheric environment.
由燃煤引起的二氧化硫污染已成为大气环境中最主要的污染因子。
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