His works are as fresh today as they were four hundred years ago.

VOA: special.2010.01.06

We're going to do this in four, just for-- just because I think it works out better so everybody tap your foot with a four beat.

我们只做四拍,因为我觉得这样的效果更好,大家都用脚打四个拍子

耶鲁公开课 - 聆听音乐课程节选

In the early days when there are four or five formulas, you could memorize all of them and you can try each one of them until something works, but after a couple of weeks you will have a hundred formulas and you cannot memorize all of them.

刚开始我们只会涉及到四,五个公式,你可以全部记下来,你可以一个一个试,直到解出答案,但过了几个星期,你就已经学了一百多个公式了,你没法全部记下来

耶鲁公开课 - 基础物理课程节选