combustion synthesis in air

• 空气中燃烧

combustion synthesis in air的用法和样例：

例句

1. A fire was burning in the grate.
   火在壁炉中燃烧着。
2. Standard plants burn coal in a boiler at atmospheric pressure.
   一个标准的电厂，是在平常的大气压下于锅炉中燃烧煤矿。