The idea behind all these algorithms is that what's ultimately important is how many comparisons you ultimately need to make.

这些算法的思想是,你最终需要做多少次的比较,这才是真正重要的。

哈佛公开课 - 计算机科学课程节选

How many times do you need to fold the piece of paper so that you can reach the moon.

需要折纸多少次,才能碰到月亮。

哈佛公开课 - 幸福课课程节选

Now before I do that, I don't need the people at home to see this, but how many of you were here last time? How many of you were not.

在家看视频的人不必关心这个,上节课你们多少人来了,多少没来

耶鲁公开课 - 博弈论课程节选

How many parameters of difference do you need?

你们需要知道多少种？

耶鲁公开课 - 心理学导论课程节选

I'd just like to do a piece of survey research, how many of you, just a show of hands is all I need; how many of you believe ? Socrates is innocent and should be acquitted?

我们来做一下意见调查，有多少人认为，只要举手就可以了;,有多少人认为,苏格拉底是无辜且应无罪开释？

耶鲁公开课 - 政治哲学导论课程节选

We know we need to divide by 266, 266 but what we need you to help us with is to figure out this top number here and see how many particles are going to backscatter. So if the TAs can come up and quickly hand out 1 particle to everyone.

知道背散射的概率就可以了，我们知道要除以,但还需要你们来搞清楚,分子上的数是多少，有多少个发生背散射的粒子,助教们请过来,把这些球分给同学们。

麻省理工公开课 - 化学原理课程节选

You need to know if it's an equilibrium, and you also need to know how many components you have in your system So, a glass of ice water with an ice cube in it, which is a heterogeneous system, has only one component, which is water, H2O.

要知道它是不是平衡的，你还需要知道,你的系统中有多少组分,一杯放了冰块的水，虽然它是个非均匀系统，但它只有一种组分，那就是水。

麻省理工公开课 - 热力学与动力学课程节选

So how many time do you think-- you all have a piece of paper in front you-- how many time do you think you need to roll over the piece of paper ? for the piece of paper to reach the moon?

你们认为需要折多少次-,你们面前都有一张纸-,你们认为需要将纸折叠多少次,才能碰到月亮？

哈佛公开课 - 幸福课课程节选