英语语法分析

Through sampling and analyzing the 12 kinds of familiar vehicle exhaust, it is found that the main organic compounds of the vehicle exhaust include olefin, alkane and dutrex.

本文对12种常见的机动车尾气进行采集，对样品分析发现，机动车尾气中主要的有机成分包括烯烃、烷烃、芳香烃类物质。