Well, if you're implementing a computer that needs to represent information now all you need is something like electricity which can be on or off, on or off.

好吧，如果你正用一个电脑,来表现表达传递信息的功能,你就需要,像电开关一样的物体。

哈佛公开课 - 计算机科学课程节选

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