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

羰合既是大气光学反的产，又能通过光学反生成羧酸、羟自由、臭和过乙酰硝酸酯。

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、碳氢合在形成光学烟雾中的作用和臭、过乙酰硝酸酯产生的过程,并介绍了光学烟雾的形成机理。