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

Tip: Wait a day or two and reread your letter several times before mailing it, so you can gain some perspective.

小贴士：在寄信前等一两天，或是多读几遍，以便看得更清。

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

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

If the reform passes, it could head off next year's planned 5.4% postal rate increase the one that will push the cost of mailing a single letter to 39 cents from 37 cents.

FORBES

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

FORBES: Magazine Article