I'm just going to go mail a letter.

我正要去寄一封信。

《柯林斯英汉双解大词典》

The longest assignment could be a cover letter, and even that might be streamlined to a networking E-mail.

最长的作业也许是一篇附信，而即便是这篇附信也可以简化为一封网络电子邮件。

youdao

This is the most obvious piece of organizing advice in the world — until you've got a letter to mail and can't find the stamps.

这是世界上对整理工作而言，最平淡无奇的建议——直到你需要邮寄一封信却找不到邮票的时候。

youdao

.. In 1799, it would cost so much to mail a letter-- I don't know exactly, something like $10 or $20 to mail a letter at today's rate-- and it would take a long time get there.

在1799年，寄封信需要花费-,我也不清楚具体的数字,大概相当于现在的10到20块钱-,而且还要花很久才能送达。

耶鲁公开课 - 金融市场课程节选

Most people wouldn't ever mail a letter or get a letter--too expensive, not to count only the paper and everything was expensive.

大多数人可能从未寄过信,或是收过信，因为太贵了，不单单是纸贵,什么东西都贵。

耶鲁公开课 - 金融市场课程节选

There was a time when it was hard to enter a NYC taxicab or men's room, or to open a mailbox to mail a letter, without confronting a sticker hawking Henry's latest effort.

WSJ: Hollywood Moments

She was able to quantify her following by the number of newspapers who bought her columns -- and by how many readers spent money on a stamp to mail her a letter.

CNN: STORY HIGHLIGHTS

The lead investigator of a controversial study of the cholesterol drug Vytorin threatened to end working with one of the drug's makers over delays in the release of the findings, according to e-mail messages excerpted in a letter sent to drugmakers Merck and Schering-Plough by Sen.

FORBES: Magazine Article