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柴油机颗粒物是主要的环境污染因子，作者研究燃油品质，主要是燃油芳香烃含量和添加剂与颗粒及多环芳烃（ＰＡＨ）的排出关系。
Diesel particulate matter is a major environmental pollutant. The authors studied the quality of the fuel, primarily the fuel aromatic content and the dependence of the additive on particulate and PAH emissions.