B-b
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
and she's crying.
她一直哭。
What we are ignorant of is immense.
我们不知道的东西多得不可胜数。
Did you leave it in water before you washed it?
在洗它之前您是不是把它泡在水里了？