Read Edit View history 烯烃 xītīng alkene Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 烯烃/烯烴 · xītīng · alkene 2026/03/04 烯烃 / 烯烴 xītīng alkene unsaturated hydrocarbons containing at least one carbon-carbon double bond 乙烯是最简单的烯烃。 noun created sense Mar 4, 2026, 02:25 AM