They are formed byatmospheric photochemistry reaction, and could product OH radical, alkyl radical, ozone,carboxylic acid peroxyacetyl nitrates by atmospheric photochemistry reaction.

羰基化合大气光化学反的产，又能通过光化学反生成羧酸、羟基自由基、臭氧和过氧乙酰硝酸。

The function of hydrocarbons and nitrogen oxides in photochemical smog formation and the formative process of ozone and peroxyacetyl nitrate are discussed.

了氮氧化、碳氢化合在形成光化学烟雾中的作用和臭氧、过氧乙酰硝酸产生的过程,并了光化学烟雾的形成机理。