Boundary problem
[计] 边界问题
🧩 词语组成解析
🗣️ 情景例句
Please hold on a moment.
请等会儿。
I can't help it, sir.
我也无能为力，先生。
It is much cheaper to post or email a long report than to fax it.
邮寄或电子邮递一封长篇报告比传真要便宜得多。