Bb
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
Maybe I'll run against him.
也许我与他竞选。
I'm afraid there's nothing available before noon.
恐怕中午前是没法看了。
Two of his assistants had been working busily since eight o'clock and had only just finished.
他手下两名店员从早上8点就开始忙碌，这时刚刚布置完毕。