浓重的烟雾
describes a dense and thick smog
形容浓密厚重的烟雾
城市烟雾
refers to smog found in cities
指城市中的烟雾
a specific type of air pollution caused by sunlight reacting with certain chemicals
烟雾水平
the measured concentration of smog in the air
空气中测得的烟雾浓度
烟雾警报
an official warning about dangerous levels of smog
关于烟雾达到危险水平的官方警告
减少烟雾
to decrease the amount or intensity of smog
减少烟雾的数量或强度
一层烟雾
used to describe smog as a covering over an area
用于描述烟雾像覆盖物一样笼罩一个区域