《斯德哥尔摩公约》禁止了12种持久性有机污染物（POPs）的生产，人们把它们叫做“十二大恶人”，如今，这9种化学毒物也被加入其中。

These nine toxic chemicals will join the Stockholm Convention's original list of 12 Persistent Organic Pollutants, referred to as the "dirty dozen."

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持久性有机污染物造成神经损害、免疫系统紊乱、癌症以及许多其他健康问题，因此是一种严重的环境问题。

POPs are a major environmental concern due to neurological damage, immune system disorders, cancer and a host of other health problems they cause.

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持久性有机污染物是一种非常难以处理的污染物形式。

Persistent organic pollutants are a particularly problematic form of pollution.

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