（1）贵函

    Your letter; Your favour; your esteemed letter; Your esteemed favour; Your valued letter; Your valued favour; Your note; Your communication; Your greatly esteemed letter; Your very friendly note; Your friendly advice; Yours.

    （2）本信，本函

    Our (my) letter; Our (my) respects; Ours (mine); This letter; these lines; The present.

    （3）前函

    The last letter; The last mail; The last post; the last communication; The last respects(自己的信); The last favour(来信).
 
    （4）次函

    The next letter; The next mail; The next communication; The letter following; the following.

    （5）贵函发出日期

    Your letter of (the) 5th May; Your favour dated (the) 5th June; Yours of the 3rd July; Yours under date (of) the 5th July; Your letter bearing date 5th July; Your favour of even date(AE); Your letter of yesterday; Your favour of yesterday's date; Your letter dated yesterday.

    （6）贵方来电、电传及传真

    Your telegram; Your wire; Your cablegram(从国外); Your coded wire(密码电报); Your code message; Your cipher telegram; Your wireless telegram; Your TELEX; Your Fax.

    （7）贵方电话

    Your telephone message; Your phone message; Your telephonic communication; Your telephone call; Your ring.
 
    （8）通知

    (Noun)
    Advice; Notice; Information; Notification; Communication; A report; News; Intelligence; Message.
    (Verb)(通知，告知) 
    To communicate (a fact) to; To report (a fact) to...on; To apprise (a person) of; To let (a person) know; To acquaint (a person) with; To intimate (a fact) to; To send word; to send a message; To mail a notice; to write (a person) information; To give notice（预告）; To break a news to(通知坏消息); To announce(宣布).

    （9）回信

    (Noun)
    An answer; A reply; A response.
    (Verb)
    To answer; To reply; To give a reply; To give one's answer; To make an answer; To send an answer; To write in reply; To answer one's letter. 
    (特此回信) 
    Reply to; Answering to; In answer to; In reply to; In response to. 
    (等候回信) 
    To await an answer; To wait for an answer. 
    (收到回信) 
    To get an answer; To favour one with an answer; To get a letter answered.

    （10）收讫，收到

    (Noun)
    Receipt(收到); A receipt(收据); A receiver(领取人，取款人); A recipient(收款人) 
    (Verb)
    To receive; To be in receipt of; To be to (at) hand; To come to hand; To be in possesion of; To be favoured with; To get; To have; To have before (a person); To make out a receipt(开出收据); To acknowledge receipt(告知收讫).