B-b
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
It was my pleasure.
这是我的荣幸。
Sorry, Mr. Green can't see you now.
对不起，格林先生现在不能见您。
Er, this is Lucy, and er, this is Lily.
这个是露茜，这个是莉莉。