Well, notice again, on each level of the tree, when I actually do the merging, so this remember, is when I wrote down just the numbers when I bottomed out with the list of size 1.

请注意，在这棵树中的每一层，我真正做合并时，就将每个大小为1的列表中的,数字写下来。

哈佛公开课 - 计算机科学课程节选

One, two, three, four, so on each level of the picture I'm drawing, I've seem only to be looking at each number once.

，2，3，4，可见，在我画的,这幅图的每一层上，对每个数字,都只会用到一次。

哈佛公开课 - 计算机科学课程节选

How do you know something like this doesn't happen every single night, every hour on the hour, ? every minute, every second?

你怎么知道这样的事,每一晚，每个小时，每分每秒都没有发生？

耶鲁公开课 - 死亡课程节选

On each level in the picture, I'm touching each number once, alright.

在这幅图的每一层上，我只会移动每个数字一次。

哈佛公开课 - 计算机科学课程节选