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

I've seen students photocopy exams down to the size of a postage stamp.

我曾看到过学生将考试内容复印到,一张邮票大小的纸上。

麻省理工公开课 - 固态化学导论课程节选