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
She is a fantastic swimmer.
她游泳游得非常好。
A life without a purpose is a ship without a rudder.
人生无目的，犹如船失去了舵。
Hey!
嗨！