“便函”怎么读？

“便函”的英语可以翻译为：an informal letter sent by an organization ...

“便函”的反义词：公函。...

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”的近义词/同义词：私函。...