Bb
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
The belief crisis occurring in the younger generation may turn out to be a big problem.
年轻一代的信仰危机很可能演化成为一个大问题。
Hush! Talk quietly.
嘘！请小声讲话。
When is the most convenient time for you?
你什么时候最方便？