Ron
abbr. 研究法辛烷值（Research Octane Number）
✅ 同义词
🗣️ 情景例句
I'd like to cash some traveller's checks here.
我想在这儿兑换一些旅行支票。
Self-trust is the first secret of success.
自信是成功的首要秘诀。
It's nothing serious.You'd better have a good rest.
（病情）不太严重。你最好好好休息一下。