Ron
abbr. 研究法辛烷值（Research Octane Number）
? 同義詞
??? 情景例句
He is an orphan, so he is not sure which family name he should have.
他是個孤兒，因而不知道他自己姓什么。
Count not your chickens before they are hatched.
不要過早樂觀。
Walt invented the steam engine.
瓦特發明了蒸汽機。