Although these smogs were not as deadly as London's, New York City has the worst air pollution problem in the United States. 虽然这些烟雾令人致死的程度没有伦敦烟雾那样厉害,但是纽约市的空气污染问题在全美国是最坏的,最严重的。
Critics also cite widespread though subjective impressions that officially low-pollution blue-sky days are often memorable more for acrid grey smogs. 批评人士还援引人们广泛抱有(尽管主观)的印象称,官方所称的低污染蓝天日,往往给人印象更深的是刺鼻的灰色烟雾。
In all the killer smogs, factories and homes poured smoke and fumes into the air from the furnaces. 在各种致人死命的烟雾中都有工厂和家庭炉灶里排放到空气中的烟尘。
Vehicles also cause air pollution, which produces city smogs, acid rain, and global warming. 交通工具也能造成空气污染,这种污染也产生了城市烟雾,酸雨和全球变暖。
The Optical Principle and Optical Systems for Measurement of IR Smogs 烟雾粒径检测的光学原理和光学系统
Determination for Total Polycyclic Aromatic Hydrocarbons of Different Smogs by Fluorometry 荧光法测定香烟烟气中总的多环芳烃含量