B-b
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
You are my best friend in the whole world.
你是我在这个世界上最好的朋友。
The capital of my country id Beijing.
我国首都是北京。
'I was just wondering how to spend the morning -- until I saw you.
“我正不知道怎么消磨这一上午呢，正好见到好。