Address a letter, stamp it and put it in your bag for tomorrow - Mailing letters is one task that seems to continually slip my mind.

写一份信，贴上邮票并把它放进明天出门所带的包里- - -寄信是我脑子一直出现的一个想法。

youdao

After all, simply mailing a letter abroad requires countries to follow a common set of postal rules that no single one of them controls.

毕竟，没有哪个国家能够仅靠一封邮件就要求其它国家遵守那些共同的一系列令人大动肝火的规则。

youdao

Sending a datagram is analogous to mailing someone a letter.

发送一个数据报就类似于寄给某人一封信。

youdao

But members of the Digital Due Process Coalition say sending an e-mail should be no different from mailing a letter that is protected by law from being opened.

VOA: standard.2010.06.22

Two months later, he pitched again, this time mailing a simple one-page cover letter.

FORBES: Magazine Article

You can report suspected tax fraud to the IRS by using Form 3949-A, Information Referral, or by mailing a letter describing the alleged fraudulent activity.

FORBES: This Year's Dirty Dozen Tax Scams