柯林斯詞典grey water 1. N household waste water that can be reused for some purposes without purification, e.g. bath water, which can be used to water plants 洗盥汙水; 不淨化就可再利用的家庭汙水→compare black water 返回 grey water劍橋詞典water that has been used before, for example for washing , that can be stored and used again, for example in toilets 灰水（使用過的水） Water companies are testing recycling units which take grey water and clean it up sufficiently for flushing toilets . 用水公司正在測試汙水再利用設備，這些設備可以淨化汙水，其産出的淨化水足以用來沖厠。 返回 grey water