“便函”造句

这封便函我们需要50份.
We need 50 copies of this memo.

你能告诉我信函和便函有什么区别 吗 ?
Can you tell me the differences between a letter and a memorandum?

感谢您7月3日的便函.
Thank you very much for your memorandum dated July 3.

• #便函