Bb
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
Certainly, sir. I'll get a taxi for you. Are you going directly to the cinema?
好的，先生。我会帮您叫车的，您直接去电影院吗？
They have been much too irresponsible for their high position.
他们虽身居要位，未免太缺乏责任感了。
I ought to go home. I have to cook supper for my grandmother.
我该回家了。我得给奶奶做晚饭。