短語詞組短語pollution hazard substance 有污染危險(xiǎn)的物質(zhì)hazard substance control 有害物質(zhì)控制hazard substance in lab 危險(xiǎn)物品hazard inherent in substance 物質(zhì)本身的危險(xiǎn)the substance hazard index 物質(zhì)危害指數(shù) 返回 hazard substance