OK, but before I do that, let me drive home this idea of why this is a recipe.

好了，但是在我做那个之前，我们要把这个想法拉回到,“为什么这是个方法“这个问题上来。

麻省理工公开课 - 计算机科学及编程导论课程节选

How much energy are you going to get out, and how far are you going to be able to drive a car with this expansion, let's say, so that's the problem.

你能获得多少能量，利用这次膨胀,你可以把你的车开出多远，比如说这就是问题所在。

麻省理工公开课 - 热力学与动力学课程节选