So here I've written for the hydrogen atom that deceptively simple form of the Schrodinger equation, where we don't actually write out the Hamiltonian operator, but you remember that's a series of second derivatives, so we have a differential equation that were actually dealing with.

这里我写出了,氢原子薛定谔方程的,最简单形式，这里我们实际上,没有写出哈密顿算符,但是请记住那你有，一系列的二次导数,所有我们实际上会处理一个微分方程。

麻省理工公开课 - 化学原理课程节选

But they don't have a set list of things that make something the canon.

但他们没有列出一系列东西,让它们成为正典。

耶鲁公开课 - 新约课程节选

We do not have a language for that, or a set of activities for that.

我们没有共同的语言，也没有一系列的活动来做这件事。

普林斯顿公开课 - 人性课程节选