B-b
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
I was teaching music,
我当时教音乐，
You should wear a lightweight suit, It's hot today.
你应该穿一套薄一点的套装，因为今天很热。
They hit us with their sticks over and over again and put some of us in prison.
他们用棍棒一次又一次的打我们，并且把我们中的一些人抓进监狱。