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1·Be careful, make sure you know the senders before you open the email.

小心，在你开信箱前要先确定那些寄件人是谁。

2·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。

3·In case of non-delivery, letters must be returned to the senders.

函件无法投递时务必退还原主。

4·The scenario depicted in Figure 1 shows several senders and receivers.

图 1 描述的场景显示了几个消息发送者和接收者。

5·Japan was fourth among the twenty leading senders of foreign students.

在20个主要留学生的派出国中，日本列第四。

6·You can set email to flag important messages from senders like your boss.

你可以在电子邮箱中进行设置，把老板等发件人的信息标为重要邮件。

7·The post office generally will send the dead letters back to the senders.

邮局一般会将挂号的瞎信退给寄信人。

8·In the best case, a slight extra effort is required for legitimate senders.

在最好的情形下，合法发送者只需花费一点点精力即可。

9·Messages sent by the senders are identified with a message format identifier.

发送方发出的消息是通过消息格式标识符识别的。

10·Only Authorized Senders may submit or issue press releases on Customer's behalf.

仅授权发稿人可以代表客户提交或发布新闻稿。

寄件人

1·Article 23. 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。