This is when you learn the laws in terms of which you can understand and explain a large number of phenomena.

从此刻开始,你们学习的理论,能帮助你理解和解释生活中的很多现象

耶鲁公开课 - 基础物理课程节选

There's different theories about why, but my point right now is simply that people don't necessarily know this but still they're subject to this.

有很多不同的理论对这种现象进行了解释，不过现在我的看法是,人们并不理解这种现象,但却仍然会这样去做。

耶鲁公开课 - 心理学导论课程节选

Because atomic theory explains things.

因为原子理论能够解释一些现象

耶鲁公开课 - 死亡课程节选