octane number
noun [ C ] uk/ˈɒk.teɪn ˌnʌm.bər/ us/ˈɑːk.teɪn ˌnʌm.bɚ/ (also octane rating)
辛烷值
a number showing the quality of petrol by representing how well and with how much power it can make an engine work
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。