Boundary problem
[计] 边界问题
🧩 词语组成解析
🗣️ 情景例句
Goodbye, thanks for inviting me. I had a lovely time.
再见，谢谢您的邀请。我度过了一段美妙的时光。
It doesn't matter to me.
两个都可以。
Yes, it is.It's very urgent.I feel awful. I have a terrible toothache.
是的，很急。我难受极了，牙痛得要命。