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
I only buy used books.
我只买旧书。
The cat followed her everywhere she went.
无论她到哪，那只猫都跟着她。
She stood up and took his arm.
她站起来，拉住他的手臂。