| 释义 |
pho.to.chem.i.calHfEJ7tEJ5kem7I7k[l, $.foJ7toJ-adj [not gradable]specialized relating to the effect of light on some chemicals光化作用的Ozone, produced by the photochemical reaction of sunlight with unburnt hydrocarbons, and carbon monoxide emissions are rising inexorably.臭氧是由阳光和未燃烧的碳化氢光化作用生成，并且一氧化碳排放量不可抗拒地升高。A photochemical smog is a fog caused by light from the sun shining on some types of chemicals in the air in areas with a lot of industry and traffic.光化烟雾Photochemical smogs are worse in summer, when the sun's rays on the cloud of traffic fumes produce a photochemical reaction, creating high levels of ozone.当夏天阳光照射在交通排放的废气团上，产生光化作用释放大量臭氧，光化烟雾就更加严重了。
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