But you can write it down It's a concept that links itself to a literary or verbal written expression.

但是你们可以将负二的平方用笔写下来,那是种概念，能将其自身,与文学或文字书面的表达连接起来。

麻省理工公开课 - 电影哲学课程节选

The sovereign is not the direct expression of my will or your will, but rather an abstraction from my natural desire to rule myself.

君主制不是对我的，或者你的意志的直接表达,不如说是一种抽象概念,是源于自己统治自己的自然愿望。

耶鲁公开课 - 政治哲学导论课程节选

Let's move on to the last topic in terms of this first exam, which is thinking about the idea of isoelectronic atoms, or isoelectronic ions. And isoelectronic is very straightforward, it just means having the same electron configuration.

下面我们继续讲第一次考试的最后一个主题，也就是等电子原子，或等电子离子的概念，“等电子的“是非常直接的表达，它的意思就是具有相同电子排布的。

麻省理工公开课 - 化学原理课程节选

In particular, all languages, at minimum, are powerful enough to convey an abstract notion like this; abstract in the sense that it talks about thoughts and it talks about a proposition and spatial relations in objects.

尤其是所有的语言都至少,能够有效地表达抽象概念,在某种意义上来说,抽象概念能够表达思想,能够表述物体的位置与空间关系

耶鲁公开课 - 心理学导论课程节选

So that right now is going to seem a little bit like a sudden blast of notation, so let's just remind ourselves what we really care about is the idea, it's not the notation, and let's spend the next half hour applying these ideas to an application.

这些看起来就是一些,毫无意义的表达式是嘛,为了更好地学习这些概念,而不是这些表达式呢,接下来的半小时,我们来联系实际

耶鲁公开课 - 博弈论课程节选