这些反应增加了不完全燃烧的可能性，更有可能释放未燃尽和光化学活性碳氢化合物到大气中。
These reactions increase the probability of incomplete combustion and are more likely to release uncombusted and photochemically active hydrocarbon compounds into the atmosphere.
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。
Certain air pollutants 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。
Certain air pollutants (see smog) become more reactive and form noxious compounds in photochemical reactions.
二氧化钛具有表面羟基、润湿性、表面酸碱性、表面电性、光化学活性等表面物理化学性质。
Titanium dioxide has unique characteristics, such as the surface hydroxy groups involved, wetting properties, surface acidity or basicity, surface electrical properties and photochemical activity.
而且，一旦生成激发三线态，它的光化学活性大约比激发单线态大2倍。
Also, the excited triplet state, once populated, is about 2 times more efficient in the formation of the colored form than the excited singlet state.
而且，一旦生成激发三线态，它的光化学活性大约比激发单线态大2倍。
Also, the excited triplet state, once populated, is about 2 times more efficient in the formation of the colored form than the excited singlet state.
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