短語(yǔ)詞組短語(yǔ)pollution point sources 汙染點(diǎn)源pollution heat sources 汙染熱源many pollution heat sources 多汙染熱源pollution point sources of toxicants 毒物汙染點(diǎn)源water body pollution sources 水躰汙染源fugitive pollution sources 散汙染源pollution of water sources 水源汙染 返回 pollution sources