A process in which an alkyl group is added to or substituted in a compound,as in the reaction of alkenes with alkanes to make high-octane fuels.是什么意思_A process in which an alkyl group is added to or substituted in a compound,as in the reaction of alkenes with alkanes to make high-octane fuels.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句