短語詞組短語pollution n hazard 污染危害pollution hazard clause 污染危險(xiǎn)條款pollution hazard substance 有污染危險(xiǎn)的物質(zhì)Pollution Hazard Index 污染危害指數(shù)marine pollution hazard 海洋污染危害pollution hazard of chemical 化學(xué)品污染危險(xiǎn)性pollution and safety hazard assessment 污染和安全危害評定middle hazard pollution 有害污染low hazard pollution 輕度污染 返回 pollution hazard