There are more variations, but it's always the same thing.

类似的问题多得很,都是大同小异

耶鲁公开课 - 基础物理课程节选

It's always a little bit cheaper. So, the same thing with e-books.

总是便宜一点。所以，对于电子书也是一样。

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So, the curious thing about recursion is that pretty much always can you implement this idea of doing the same thing again and again and again but with smaller bytes each time.

可见，递归算法中新奇的一点是,为了实现一个想法,你可以一遍又一遍地做相同的事情,但每次的规模都会有所减小。

哈佛公开课 - 计算机科学课程节选