
好词典

1905年由'smoke'(烟)和'fog'(雾)组合而成,最初用于描述伦敦的空气污染状况。
❶ 指城市中由雾与烟尘混合形成的空气污染现象,常呈现为灰黄色雾状,主要由汽车尾气和工业排放造成。
“The heavy smog made it difficult to see buildings across the street.”
(严重的烟雾让人看不清街对面的建筑物。)
“People wore masks to protect themselves from the toxic smog.”
(人们戴着口罩以防吸入有毒烟雾。)
photochemical smog — 光化学烟雾,指阳光作用下汽车尾气中的污染物发生化学反应形成的褐色烟雾,常见于大城市。
“Los Angeles is famous for its photochemical smog problems.”
(洛杉矶以其光化学烟雾问题闻名。)