In 1997, for instance, the E.P.A. moved to reduce surface ozone, a form of pollution caused, in part, by emissions from oil refineries.
举例来说，1997年，美国环保署意图降低地表臭氧量标准——一种部分由石油精炼排放的污染物造成的污染。
The results indicate that impacts of atmospheric particles on photochemistry and oxidation ability of atmosphere are responsible for the reduction of the observed surface ozone concentration.
研究表明，颗粒物对光化学过程的抑制造成了大气氧化能力的降低，是近地面臭氧浓度减少的可能原因。
The results indicate that impacts of atmospheric particles on photochemistry and oxidation ability of atmosphere are responsible for the reduction of the observed surface ozone concentration.
研究表明，颗粒物对光化学过程的抑制造成了大气氧化能力的降低，是近地面臭氧浓度减少的可能原因。
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