你到达以后给我来一封信。

Drop me a line when you arrive.

youdao

钱来的愈发少了，甚至以前每个月都来一封信的老朋友现在也难得来一回了，歉意的短信，一小笔钱。

The money comes less often, and even old friends who used to write monthly now send only rare, apologetic notes, a few small bills.

youdao

我来为你草拟一封信。

I'll draft a letter for you.

《牛津词典》

Suppose you get a letter from your company saying, congratulations here's a $5 dividend and here's a check for $5 if you owned one share.

假设你收到了公司寄来的一封信,写着,恭喜您,这是5美元的分红,如果你有一股的话,就会收到5美元

耶鲁公开课 - 金融市场课程节选