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al·kyl·a·tion AHD[ăl'kə-lāʹshən] D.J.[ˌælkəˈleɪʃən]K.K.[ˌælkəˈleʃən]n.Chemistry（名词）【化学】- 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
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