Bb
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
thank you very much.
十分感激你。
Our new product line has been very successful. We've expanded the factory twice this year already.
我们新的生产线非常成功，我们今年已把工厂扩展了两倍。
when the whole animal is sometimes preserved, as in a refrigerator.
有时整个动物像被放在冰箱里一样被保存下来，