A pollutant Also known as the " primary pollutants. "

一次污染物又称 “ 原生污染物 ”.

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Air pollutants are separated into two categories: primary pollutants and secondary pollutants.

污染物可分为两类别: 主要染物及次级污染物.

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Also known as the " primary pollutants. "

又称 “ 原生污染物 ”.

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