[wū rǎn]
pollute; contaminate
atmosphere pollution
大氣層污染
moral pollution
道德污染
underground (water) pollution
地下（水）污染
radioactive contamination
放射性污染
industrial pollution
工業(yè)污染
industrial dust pollution
工業(yè)粉塵污染
chemical pollution
化學(xué)污染
environmental pollution
環(huán)境污染
spiritual contamination
精神污染
air pollution
空氣污染
floating dust pollution; airborne dust pollution
飄塵污染
water contamination
水污染
noise pollution
噪音污染
debase the standards of social conduct
污染社會風氣
Soot fouls the air.
煙屑污染空氣。