B-b
abbr. 滚珠轴承（ball bearing）；铅笔芯（double black）
🗣️ 情景例句
1, 2, 3, kick... 1, 2, 3, kick... pony. 1 2 3
踢 ……1 2 3踢……小马步
Who is the lady in white?
穿白衣服的那位小姐是谁？
What do the machines do? asked Jim.
“这些机器做什么用？”吉姆问。