短語詞組短語pollution n hazard 汙染危害pollution hazard clause 汙染危險(xiǎn)條款pollution hazard substance 有汙染危險(xiǎn)的物質(zhì)Pollution Hazard Index 汙染危害指數(shù)marine pollution hazard 海洋汙染危害pollution hazard of chemical 化學(xué)品汙染危險(xiǎn)性pollution and safety hazard assessment 汙染和安全危害評定middle hazard pollution 有害汙染low hazard pollution 輕度汙染 返回 pollution hazard