Read Edit View history 丁烯 dīngxī butene Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 丁烯 · dīngxī · butene 2026/03/04 丁烯 dīngxī butene butene or butylene C4H8 丁烯是一种重要的化工原料。 noun created sense Mar 4, 2026, 02:25 AM