noun🔗Share辛烷，辛烷值。 Any of the eighteen isomeric aliphatic hydrocarbons (C8H18) found in petroleum, especially an iso-octane 2,2,4 trimethyl-pentane; they are used as fuels and solvents."The car engine requires high octane fuel to prevent knocking and improve performance. "这款汽车引擎需要高辛烷值的汽油，以防止爆震并提升性能。compoundsubstancechemistryfuelChat with AIVocabulary GamePractice Reading
