noun🔗Share丁二烯 An unsaturated hydrocarbon, CH2=CH-CH=CH2; it is obtained from petroleum and is used in the preparation of the synthetic rubber polybutadiene."Many tires are made using butadiene, a chemical derived from petroleum. "许多轮胎都是用丁二烯制成的，这是一种从石油中提取的化学物质。compoundsubstancechemistrymaterialfuelChat with AIVocabulary GamePractice Reading
