urban area pollution sourceurban area source市区: city proper; downtown area; ...污染源: pollution source居民区污染: community pollution污染源: contaminant source; contaminative source; long term effect of pollutant; pollutant source; polluter; pollutio oruce; pollution soruce; pollution sources; pollutor; source of contamination; source of pollution污染者;污染源: polluter下载手机词典可随时随地查词查翻译