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1·Photochemical smog is found in many large cities all over the world.

光化学烟雾在世界各地的许多大城市里都有。

2·There are increasing concerns on the air pollution caused by photochemical smog in cities.

城市的光化学烟雾引起的大气污染越来越引起人们的关注。

3·An air quality simulation model-column model for describing photochemical smog pollution at Xigu district in Lanzhou has been developed.

以兰州西固地区为研究对象，建立了描述该地区光化学烟雾污染的大气质量模拟模式——柱子模式。

4·Ozone at ground level - not to be confused with the ozone layer in the upper atmosphere - is one of the major constituents of photochemical smog.

与高层大气臭氧层不同的是，地面的臭氧是光化学烟雾的一个主要组成部分。

5·Photochemical smog: Smog produced by action of solar radiation, especially of ultraviolet radiation, on exhausts from vehicles and industry.

太阳辐射，尤其是紫外线辐射对汽车和工业所排放的废气产生光化作用而形成的烟雾。

6·Using the model and monitored data for photochemical smog in Xigu industrial area of Lanzhou city for 6 days of August, 1983, the numerical simulation was run.

我们用此模式计算了1983年8月中旬兰州市西固地区的光化学烟雾浓度。

7·The formation of photochemical smog, the reaction mechanism, the harm to our humanity, the zoology and botany and the preventive measure are introduced in this paper.

本文介绍了光化学烟雾的形成机理，对人类、动植物等的危害并提出了预防措施。

8·Certain air pollutants (see smog) become more reactive and form noxious compounds in photochemical reactions.

某些空气污染物在光化学反应中变得活性更强，形成有毒的化合物。

9·Photochemical ozone and smog are created as nitrogen oxides and hydrocarbons react to sunlight.

光化学烟雾的臭氧和氮氧化物和碳氢化合物在阳光下产生的反应。