In 1783, the Icelandic volcano Laki sent a sulphurous smog over Europe, plunging it into an extreme winter that killed thousands.
1783年，冰岛拉基火山喷发，硫酸烟雾，笼罩欧洲大地，陷入了极端的冬季，致使数千人死亡。
Northern China is often cloaked in smog, especially during the cold winter months when homes and power plants burn coal to keep warm.
中国北方城市经常被雾霾所笼罩，尤其是在寒冷的冬季，家庭和发电厂都是靠烧煤来取暖。
China's smog is worst in the winter, when households consume more electricity from coal-fired power plants, and municipal heating is turned on.
中国的雾霾在冬季里是最糟糕的。冬季时，家庭消耗更多由燃煤发电厂生产的电能，并且城市供暖系统开始运行。
Industry insiders said heavy smog has become the major driver of winter travel.
业内人士称，严重的雾霾已成为冬季旅游的主要驱动力。
In winter, there is a dense smog layer over Lanzhou city.
冬季兰州城市上空形成浓厚的烟雾层。
It has grounded planes, closed roads and even been compared to a nuclear winter, but one couple were not going to let the smog in Beijing ruin their big day.
雾霾已经迫使飞机停飞、公路封闭，甚至它还被比作核冬天。但有一对新婚夫妇绝不容许北京的雾霾毁了自己结婚的大日子。
In the winter of 1952, dense smog in London caused mainly by heavy coal combustion killed about 12,000 people in the city.
1952年冬天，由于人们过度烧煤造成伦敦当地的烟雾浓度过大，致使约1.2万人死亡。
In the winter of 1952, dense smog in London caused mainly by heavy coal combustion killed about 12,000 people in the city.
1952年冬天，由于人们过度烧煤造成伦敦当地的烟雾浓度过大，致使约1.2万人死亡。
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