(1)污染 (make sth dirty and dangerous to live in or to use) [T+n， T+n+prep(with)]： Traffic～s our cities. 交通污染我们的城市。rivers and lakes～d with chemical waste from factories 被工厂的化学废物污染的河流湖泊;～d water/air 被污染的水/空气;

(2)污染(头脑)，败坏(道德) (destroy the purity of the mind) [T+n， T+n+prep(with)] (fig)：～the minds of the young with foul propaganda 用邪恶的宣传污染青年人的思想;(violent films)～children's minds (暴力电影)对孩子的思想有害;His mind is～d by wicked thoughts. 他的头脑受到邪恶思想的腐蚀。

→pol′lutant n 污染物质;pol′lution n 污染;污染物质