B-b
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
Stay right where you are.
站住别动！
He that doth most at once doth least.
想一次做完什么事，结果一件也做不完。
Yes, I have.I think that.I've hurt my back.
是啊，摔伤了。我想我把背摔坏了。