hep.tane
n.（名词）A volatile, colorless, highly flammable liquid hydrocarbon, C7H ', obtained in the fractional distillation of petroleum and used as a standard in determining octane ratings, as an anesthetic, and as a solvent. 庚烷：一种易挥发、无色、非常易燃烧的液状碳氢化合物，C7H '，由石油的分级蒸馏而来，用作辛烷分级的标准，亦可作麻醉剂和溶剂
