| 单词 | high-octane fuel |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔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Oil companies claim that high-octane fuel keeps engine parts cleaner than regular gasoline.石油公司声称高辛烷燃料比传统汽油更能保持引擎部件的清洁度。剑桥国际 |
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