Why don't we say the same $5 check is included but, in the letter, let's say something different?

同样是5美元股利的支票,但在信中,我们换种方式来说

耶鲁公开课 - 金融市场课程节选

So let them send you their copy, and you send a copy of this letter to them.

所以叫他们把副本送给你们，你们则把这封信的副本送给他们。

耶鲁公开课 - 新约课程节选

Let's forget about a letter, let's stick with an e-mail, or a text message.

就算你没有写过信，写电子邮件，发短信也算一种写作。

普林斯顿公开课 - 人性课程节选