Rbd
abbr. rapid beam deflector 快速波束偏转器; required beginning date 必需的初始日期; right border of dullness 右浊音界（心脏叩诊）
🗣️ 情景例句
It's certainly a pleasure to meet you.
认识你真是我的荣幸。
He wants to change his appointment from Monday to Wednesday.
他想要把他的约会从星期一改到星期三。
What's that fly doing in my soup?
我汤里的这只苍蝇在干什么呢？