1. I am writing to confirm /enquire/inform you,,我写信是要确认/询问/通知你

　　2. I am writing to follow uo on our earlier decision on the marketing campaign in Q2..我写信来追踪我们之前对于第二季度营销活动的决定。

　　3. with reference to oue telephone conversation today..关于我们今天在电话中的谈话。。

　　4. in my previous e-mail on October 5..先前在10月5日所写的信。。

　　5. as I mentioned earlier about..如我先前所提关于。。

　　6. as indicated in my previous e-mail.. 如我先前在信中提出

　　7. as we discussed in the phone..如我们上次在电话中的讨论

　　8. from our decision at the previous meeting..如我们上次在会议中的决定

　　9. as you requested/per your requirement 按照您的要求

　　10. in reply to your e-mail dated April 1, we decided ..答复您4.1日写的信，我们决定