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