| 释义 |
DEFINITIVE EXAMPLES 权威例句〔alkene〕Ethene and propene are alkenes.乙烯和丙烯都是烯烃。剑桥高阶〔alkylation〕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.烷化作用，烷基取代：向一种化合物中添加或用一个烷基团替代的过程，如用烯烃和烷烃发生反应以制得高辛烷值燃料美国传统 |