1.
Return if undelivered.
无法投递，请退回原处。
2.
Undeliverable, returned to sender.
无法投递, 退回原处。
3.
There are many blind letters every year in the post office.
邮局每年有许多无法投递的信件。
4.
Parcels which cannot be delivered will be returned to the senders.
无法投递的包裹会退还给寄件人。
5.
blind department
处理无法投递信件的部门
6.
Undeliverable postal materials shall be returned to the senders.
无法投递的邮件,应当退回寄件人。
7.
The undelivered letter has been returned to the sender.
那封无法投递的信已退回给发信人了。
8.
The mail clerk was sorting some of the letters that had been misaddressed.
收发员正在那里整理无法投递信件。
9.
Sender's instructions in case of non-delivery (at sender's expense)
如无法投递,寄件人(费用自理)须知:
10.
It is impossible to deliver this letter because the address is illegible.
由于地址字迹不清，致使信件无法投递。
11.
In case of non-delivery, return to (the) sender
(邮件用语)无法投递时, 退回原处。
12.
Article23. Undeliverable postal materials shall be returned to the senders.
第二十三条无法投递的邮件，应当退回寄件人。
13.
If undelivered, return to sender, eg on a letter.
若无法投递, 请退还寄件人（如信件上的字样）.
14.
Disposal measures for other undeliverable and unreturnable postal materials shall be formulated by the competent department of postal services under the State Council.
无法投递又无法退回的其他邮件的处理办法,由国务院邮政主管部门规定。
15.
If the registered mail or postage due mail can not be delivered in the manner illustrated above, further actions taken should follow the provisions specified under Article 48 hereof.
挂号邮件及欠资邮件无法依前项规定投递者，依第四十八条所订之规则有关投递规定办理。
16.
You cannot post this form to this public folder. See the public folder contact.
无法将表单投递到该公用文件夹。请与公用文件夹的管理员联系。
17.
Unable to open outgoing newsgroup file. Please update your discussion composition preferences before posting
无法打开发送新闻组文件。在投递之前请更新您的讨论编写首选项
18.
This is a dead letter, so I can not deliver it.
这是一封盲信, 我没有办法投递。