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.
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.
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