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
Please do the work at your own convenience.
请在方便时把这事做一做。
One penny with right is better than a thousand without right.
合法取得的一辨士，胜于非法取得的一千辨士。
You look as if you didn't care.
你看上去好像满不在乎。