reference

1.reference不论用在哪个意思里，后面都接to。例如：All are admitted, without reference to age or sex.和On receiving her application he made a reference to her parents.

2.商业复信的开首往往用With reference to your letter...。在一般通信里该避免。

3.with reference to比in reference to普通。两种表达方式都主要用在商业信函和公文里，很少用在口语里。注意那to是介词，不是不定式的符号，所以With（或In）reference to editing a school paper, he has given us several valuable suggestions里的editing不可改作edit。