Bb
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
Nowadays more and more people are without jobs.
现在越来越多的人失业。
The paint bucket fell down on his head.
油漆桶扣在了他的头上。
What's your favorite steps?
你最喜欢跳什么舞？