2. 外语
  3. 近来中国的许多城市被灰霾(smog)笼罩，这种灰霾天气导致了交通瘫痪(cripple)、航班延迟及其他许多问题。引起灰霾天气的原因有很多，最主要的原因是空气质量的恶化。随着城市人口增长和工业的发展，机动车辆猛增，污染物大量增加，直接导致了空气能见度降低。相

近来中国的许多城市被灰霾(smog)笼罩，这种灰霾天气导致了交通瘫痪(cripple)、航班延迟及其他许多问题。引起灰霾天气的原因有很多，最主要的原因是空气质量的恶化。随着城市人口增长和工业的发展，机动车辆猛增，污染物大量增加，直接导致了空气能见度降低。相

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问题     近来中国的许多城市被灰霾(smog)笼罩，这种灰霾天气导致了交通瘫痪(cripple)、航班延迟及其他许多问题。引起灰霾天气的原因有很多，最主要的原因是空气质量的恶化。随着城市人口增长和工业的发展，机动车辆猛增，污染物大量增加，直接导致了空气能见度降低。相关数据显示，能见度降低使交通事故频发。此外，灰霾会对人们的身体健康造成极大危害，最近几年患呼吸系统疾病(respiratory disease)的人数已经猛增。因此，减少污染源和削减大气污染物是解决雾霾的根本之道。
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答案 Recently many cities in China are shrouded by smog and the smoggy weather has caused the crippled traffic, flight delays and many other problems. There are multiple factors contributing to the smoggy weather, the most important of which is the deterioration of air quality. With the growth of urban population and the development of industry, motor vehicles surge and the amount of pollutants increases massively in large cities, which directly reduces air visibility. Relevant statistics reveal that the visibility reduction leads to frequent traffic accidents. In addiction, smog can do great harm to people’s health and the number of people who suffer from respiratory diseases has increased dramatically in recent years. Thus, the fundamental way to tackle smog is to decrease pollution sources and reduce air pollutants.
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