The notion of recipes, the notion of computation, why you want to do this, what you're going to learn.

秘诀和计算的一些概念啊，以及我们为什么要学这些知识，和要学习的具体内容。

麻省理工公开课 - 计算机科学及编程导论课程节选

Why are we doing this? Because there's an important lesson here.

为什么要学这些,因为有个重要结论

耶鲁公开课 - 博弈论课程节选