In fact, until we do electricity and magnetism the next semester, everything's going to be based on just the laws of Newton.

其实,在下学期学习电磁学之前,所有的内容都是基于牛顿定律的

耶鲁公开课 - 基础物理课程节选

But in hard drives where we actually have these moving platters, here is in fact, how we get from electricity and magnetism to those zeros and ones.

但是在传统硬盘中我们确实有高速运转的磁盘，这就是事实，但问题是我们如何,把电磁信号转化为0和1的。

哈佛公开课 - 计算机科学课程节选