() used in letters, emails, etc. to refer to a previous letter, email, conversation, etc. （用於信件、电子邮件等）先前的（信件、电子邮件、谈话等）◆Further to our conversation of last Friday, I would like to book the conference centre for 26 June. 继我们上星期五的谈话之後，我想预订 6 月 26 日的会议中心。