The Nuyorican Poets Caf is in a three- level building.

VOA: special.2009.04.27

So at this point in the story-- at this level in the story, if you will, I've touched one, two, three, four numbers total or I've made two comparisons.

那么这时，我总共已经动过了1，2，3，4个数字,或者说我做了两次比较。

哈佛公开课 - 计算机科学课程节选

When I started merging, I did merging three times across this whole board, this level, this level, and this level, and each time because of the way I was advancing my fingers I touched each number just once.

在整个过程中，我一共做了,三次合并，这一层，这一层，和这一层，而且每次,由于要前移手指，因此对每个数字,仅仅移动了一次。

哈佛公开课 - 计算机科学课程节选

If he is confirmed by the Senate to the Cabinet-level post, Lew would inherit a deficit of more than $1 trillion for the first three-quarters of this fiscal year, with more deficits to come.

VOA: standard.2010.07.13

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