Most of these substances directly result from the industrial, urban and vehicular combustion of fossil fuels.

VOA: standard.2009.03.23

Well, if you get the combustion chamber hot enough, in point of fact, there are some reactions between nitrogen and the oxygen.

如果燃烧室的温度足够高的话，实际上在氮气和氧气之间,会发生一些反应。

麻省理工公开课 - 固态化学导论课程节选

I want to see the end of the internal combustion engine applied to personal mobility.

我想见证内燃机不在应用于,人们出行生活。

麻省理工公开课 - 固态化学导论课程节选