We hand you a bunch of programming code that we wrote because this is very much the norm in the real world.

我们给你们一些我们自己写的代码,因为在现实世界中这都是非常正常的。

哈佛公开课 - 计算机科学课程节选

So the lessons to be learned, after years of watching this, is that the norm is change.

因此在观察许多年后，我发现了经验，改变是一种常态。

普林斯顿公开课 - 领导能力简介课程节选

Okay, so you could see difficulties in estimating on both sides of the norm. Yes?

所以你们可以看到在一定范围内,做估算有多困难

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选