挥发性有机化合物来自不完全燃烧，并经由燃油蒸发到达大气。
Volatile organic compounds are created from incomplete combustion and reach the atmosphere through fuel evaporation.
整个南京地区的大气颗粒物中半挥发性有机物的主要污染源为燃煤源、交通排放源、燃油及矿物燃料残留物排放源、焚烧源，其贡献率分别为：44.0％、31.0％、19.9％、4.7％。
The main pollution sources are coal combustion, traffic emission, the residue of oil or mineral combustion and burning emission which accounts for 44.0%, 31.0% 19.9% and 4.7% of SVOCs, respectively.
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