B-b
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
You can play it practically anywhere. How good are you at it, Mr. Lu?
你可在任何地方练习球。陆先生，你擅长乒乓球吗？
La, la, I wash them, and then I dry them.
啦啦，洗濯之后就把它们晒干。
Great! Could you bring it to school tomorrow?
好极了！你明天能把它带到学校来吗？