business correspondence造句

1、Used in business correspondence when the topic of the letter is serious.
用于通信话题比较严肃的商务信件中。

2、I drafted business correspondence for the general manager.
我为总经理起草商业信件。

3、In fact, the business correspondence has whose peculiar writing principle.
实际上，商业书信有其特殊的写作原则。