atmospheric pullution sources

英 美
  • 大气污染源
  • atmospheric adj.大气的;大气层的;制造气氛的
  • pullution 污染
  • sources n.来源;发源地;原始资料v.从...获得
    1. Vehicle emission has become the major sources of air pollutants in the large cities.
      大城市中机动车排放已成为主要大气污染源。