Bb
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
He knows all there is to know,
他无所不知，
He hears a nice tune. Now, he is listening to it.
他听到了美妙的旋律。现在，他在倾耳聆听。
I'd like a cigarette, too.May I have one?
我还想抽枝烟。可以给我一枝吗？