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

羰基合物既是大学反的产物，又能通过学反生成羧酸、羟基自由基、臭氧和过氧酸酯。

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

介绍了氮氧物、碳氢合物在形成学烟雾中的作用和臭氧、过氧酸酯产生的过程,并介绍了学烟雾的形成机理。