Jb
abbr. 分线盒（Junction Box）
🗣️ 情景例句
He and Michelle
他和 Michelle
Sure. We are friends since primary school.
当然，我们从小学就是朋友了。
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支笔拴在重物上，笔尖落在地板上的一张纸上，