Come on, you know, representing sets of integers, this is pretty dumb. Suppose I want to have a set of characters. How could I do that?

你知道的，表示整数的集合,这好傻啊,假设我有一组字母的集合？

麻省理工公开课 - 计算机科学及编程导论课程节选

You say, well, why are you doing something so foolish?

你会说，你为什么在做那么傻的事啊？

麻省理工公开课 - 固态化学导论课程节选