the process of making air, water, soil, etc. dirty; the state of being dirty 污染；玷污；弄脏◆We need stricter measures to reduce environmental pollution. 我们需要有更严格的措施来减少环境污染。◆The company denied responsibility for the pollution of local lakes and rivers. 这家公司拒绝对当地湖泊和河流的污染负责。
substances that make air, water, soil, etc. dirty 污染物◆A cloud of pollution hangs over the city. 城市上空笼罩着一团污染物。