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
He's living on easy street.
他过得很富裕。
When did you do homework?
你什么时候做家庭作业？
that if we escape wars, accidents and diseases we shall eventually 'die of old age',
既使我们能避开战争、意外的事故和各种疾病，我们最终也会"老死；