Seneca Caverns and Smoke Hole Caverns have been used through the ages.

VOA: special.2009.07.20

People have done experiments through the ages, and they've accumulated the knowledge from these experiments, and they've synthesized these experiments into a few basic empirical rules, empirical laws, which are the laws of thermodynamics.

很长的时期内，人们做了大量的实验，从这些实验中积累知识,将这些实验总结成一些基本的经验法则和定律，这就是热力学的定律,然后，人们给这些定律添加，数学架构。

麻省理工公开课 - 热力学与动力学课程节选

And, Aristotle gave us this system, which persisted almost through the Middle Ages. And, Aristotle gave us this, and I'll leave you with this.

他带给我们这个系统，一直统领着我们,直到中世纪，亚里士多德给了我们这个，你们自己看吧。

麻省理工公开课 - 固态化学导论课程节选

I, somehow if, I want to walk through some sequence of data structures, gathering up or doing the same thing, adding ages in until I get a total age and then divide by the number faculty.

我想，以某种方法，来遍历,一些数据结构，把它们相同的属性加到一起，就是一直的把年龄加到一起一直到,得到了一个年龄总数,然后除以员工的数目。

麻省理工公开课 - 计算机科学及编程导论课程节选