In week zero, when we tore the phonebook in half and half and half we were recursing through that problem.

当我们将电话簿划分为一半又一半的时候,其实就是利用递归在解决问题。

哈佛公开课 - 计算机科学课程节选

It's kind of like the average price of a share adjusted for splits because you don't want the--obviously when they do a two-for-one split, the price falls in half and that's meaningless, so you want to correct for splits.

有点像经过分割调整的股票平均价格,因为你不想,当一股分割成两股,价格下跌一半,这是没意义的,所以要修正分割

耶鲁公开课 - 金融市场课程节选