The device is the size of a postage stamp.

VOA: special.2011.05.25

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

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