1. I am writing to confirm /enquire/inform you 我写信时要确认/询问/通知你2. I am writing to follow up 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 our 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 如我先前所提及关于6. as indicated in my previous e-mail 如我在先前的信中所提出7. As we discussed on the phone 如我们上次在电话中的讨论8. from our decision at the previous meeting 如我们在上次会议中的决定9
