Ron
abbr. 研究法辛烷值（Research Octane Number）
✅ 同义词
🗣️ 情景例句
Which part of the paper do you read first?
你会先看报纸的哪一部分？
What kind of talk is that?
你说这什么话？
Gradually the river grows wider, the banks recede,
然后河面渐渐地变宽，两岸后撤，