氯代有机物是一类重要的难降解性有机化合物，对人类的健康和环境具有极大的危害性。
Chlorinated organic wastewater is harmful and resistant to degradation, which imperils human being's health and environment seriously.
多氯联苯：任何一种由氯与联苯反应生成的非常稳定的二环有机化合物。
PCB (polychlorinated biphenyl) : Any of a class of highly stable organic compounds prepared by the reaction of chlorine with biphenyl, a two-ring compound.
多氯联苯：任何一种由氯与联苯反应生成的非常稳定的二环有机化合物。
PCB (polychlorinated biphenyl) : Any of a class of highly stable organic compounds prepared by the reaction of chlorine with biphenyl, a two-ring compound.
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