What you'll do is every day for the next 30 days give me one cent, next day two, four, eight and so on.

你们要做的是在未来30天给我一分钱，第二天二分，然后是四分，八分，以此类推。

哈佛公开课 - 幸福课课程节选

There's twenty-one days, there's thirty days, there's twenty-four hours. Now look at this!

有二十一天法,三十天法,二十四小时法,还有这个

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选