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

in a very simple way, in its simplest form, to really just ask without any undertones,

简单地说，你就可以用不带任何画外音的最简洁表述，

Do you ever课堂 - SpeakingMax英语口语达人

Things like the platonic form are eternal, and their eternal changeless, indestructible because they are simple.

像柏拉图形式这样的东西是永恒的，而永恒的东西是不变的不可毁灭的,因为它们是简单的。

耶鲁公开课 - 死亡课程节选

Finally, Milton's poem is late by virtue of the simple fact that it's written in the form of an epic. An epic might have seemed like a great idea when Milton was nineteen, but by the time Milton gets actually around to writing it, it's an entirely superannuated, utterly outdated form.

最后，弥尔顿这么晚才写这首诗是因为,这是一首史诗，在弥尔顿19岁的时候,写首史诗看起来可能是个好主意，但到了弥尔顿真正要写的时候，史诗已经是一种完全落伍过时的诗体了。

耶鲁公开课 - 弥尔顿课程节选

Atoms of different elements combine in simple whole number ratios to form compounds.

不同元素的原子,以简单的整数比化合成化合物。

麻省理工公开课 - 固态化学导论课程节选