Bb
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
Thank you, Mr. Lu. Please wait a moment while I check our reservations list.
谢谢，陆先生。请稍等，我查一下订房名单。
A little learning is a dangerous thing.
浅学误人。
Han Meimei, please look after the twins today.
韩梅梅，今天请照顾两姐妹。