noun🔗Share烯烃，烯类。 An unsaturated, aliphatic hydrocarbon with one or more carbon–carbon double bonds"Chemists study alkenes because these molecules are important building blocks for making plastics and other materials. "化学家研究烯烃，因为这些分子是制造塑料和其他材料的重要构成单元。compoundsubstancechemistryfuelChat with AIVocabulary GamePractice Reading
