Bb
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
My younger brother, Robbie.
这是我弟弟Robbie
The young man had been well aware of her presence at the party.
那个年轻人早已注意到她在宴会上。
I expect to be there this evening.
我打算今天晚上到那儿去。