Bb
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
Where are you working now?
你现在在哪里工作？
And the problems that some of us have had in the past year.
和去年我们一些人遇到的问题。
Dad, this is Li Lei. Li Lei, this is my father.
爸爸，这是李磊，李磊，这是我爸爸。