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's always changing jobs.
她老是换工作。
We guarantee quality products which can stand fierce competition.
我们保证提供能经得起激烈竞争的高质量产品。
Bring the picnic basket up here, under this big tree, said Ann.
“把野餐篮子拿到这儿来，放在这棵大树下，”安说。