Phenols is the primary pollutant for the human health.

酚类是主要的危害健康污染物。

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The primary pollutant of surface sediment is Organic matter.

表层沉积物主要污染因子为有机质；

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The primary pollutant of surface sediment is Organic matter.

表层沉积物主要污染因子为有机质；

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