impurity
noun uk/ɪmˈpjʊə.rə.ti/ us/ɪmˈpjʊr.ə.t̬i/
(MIXED)
[ C or U ]纯度不高，杂质
the fact that a substance is dirty or lower in quality because it is mixed with another substance, or something that causes this
Impurities are removed from the blood by the kidneys. 肾脏将血液中的杂质除去。
The impurity of the water is a health risk. 不洁的水质对健康是个威胁。
(BAD)
[ U ] literary or humorous不纯洁，淫秽
sexual thoughts or behaviour that are wrong or not moral