在讨论这些政策争议之前，我先说说几个数字。

Before I get to those policy disputes, here are a few Numbers.

youdao

这里是几个数字，在网上都有，你们不用抄下来。

I have here for you some Numbers which, of course, are on the Web so you don't have to copy them.

youdao

20,28,50和82这几个数字对于质子和中子来说是很微妙的。

The Numbers 2, 8, 20, 28, 50 and 82 are magic for both protons and neutrons.

youdao

But again, the key takeaway there was how many numbers did I touch on that pass?

同样，在这个过程中,我一共移动了几个数字？

哈佛公开课 - 计算机科学课程节选