Boundary problem
[计] 边界问题
🧩 词语组成解析
🗣️ 情景例句
You won't believe this,
简直不会相信，
The sleeping fox catches no poultry.
睡觉的狐狸抓不到鸡鸭。
Yes, they're free. But there's usually a long line.
是的，免费。但常常要排长队。