The term photochemical oxidants refers to the secondary pollutants formed in photochemical smog.

光化学氧化剂这一词是指在光化学烟雾中生成的次生污染物.

辞典例句

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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