封内地址/收信人地址 The inside address
信封上的地址的书写方式：收信人的姓名和地址必须在信封的中央，称呼总是和姓名连在一起的。
Addressing the envelope: the name and address must appear in the middle of the envelope. Titles are always used with names.
收信人地址：(靠左，写于回信地址的下一行)这显示了谁是该信的收信人。
Mailing address of recipient: (Left-hand side, one line below the return address) This identifies the recipient of the letter.
你可以在纸张的左上角方向写下你的地址，但是不需要写收信人的地址。
You can write your address in the top left hand corner of the paper, but you don't need to write the recipient's address.
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