smog
单词辨析：
指由烟、灰尘或轻微水蒸气引起的雾气，通常在天气炎热时出现。
There is haze today because the wind has carried smoke from the steel plant.
风把钢厂的烟吹过来了，所有今天有点烟雾。
The car drove in the morning haze.
汽车在晨霾中向前行进。
Look! The sun is surrounded by a golden haze.
看！太阳被笼罩在一片金色烟霞中。
主要指近地面空气冷却使水气凝结而形成的雾，能见度较低。
You can lose your way in thick fog.
在大雾中你会迷路的。
London used to have dense fogs in winter.
伦敦过去在冬季常有浓雾。
指由小水滴构成的轻雾，即雾霭。
The hills were covered in mist.
群山笼罩在雾霭中。
Late autumn is the season of mists.
深秋是多雾的季节。
该词由 smoke 和 fog 合成，通常指工业区里烟和雾的混合物，多见于重工业城市。
Black smog reduced visibility to about thirty yards.
黑色的烟雾使能见度降到大约30码左右。
The pollution caused by cars leads to smog and acid rain.
汽车污染会造成烟雾和酸雨。
相关例句：
The term photochemical oxidants refers to the secondary pollutants formed in photochemical smog.
光化学氧化剂这一词是指在光化学烟雾中生成的次生污染物。
Car exhaust is the main reason for the city's smog problem.
汽车废气是城市烟雾问题的主要原因。
We create ordered energy from oil and coal at the price of the entropy of smog.
我们从石油和煤炭里创造出有条不紊的能量，其代价却是烟雾造成的熵。
Pollution-control measures are either not strict or non-existent, leading to choking clouds of smog.
污染控制措施，或者不严格或根本不存在，导致窒息云彩的烟雾。
Smog not only exacerbates asthma, but also causes it.
烟雾不但能加重哮喘，还可以引起哮喘。
The problems we are facing are mainly street level pollution and regional smog.
我们面对的空气污染问题，主要是路边空气污染和区域性烟雾问题。