I think your word "vocation" is the key, certain kind of calling, And I signed the divine wisdom actually.

我认为你所说的“职业“是关键，这是一种召唤，我做的是宣扬神的智慧。

普林斯顿公开课 - 人性课程节选

We've distinguished three different views as to the secret or key to personal identity across time.

我们陆续已经辨别了三种不同的,关于个人认同感关键的理论观点。

耶鲁公开课 - 死亡课程节选

or at least one mechanism, I shouldn't say -- the only one-- one mechanism for doing that is going to be to add functions is that it's going to provide both of these things, so the first thing it's going to do is, it's going to let us break up into modules.

我们处理这些的机制--至少一种机制,我不会说只有一种,一种机制是在我们的语言中增加函数,函数的关键是它要提供分解和抽象,所以第一件要做的事，就是将代码分解为模块。

麻省理工公开课 - 计算机科学及编程导论课程节选

Now, that's a very important point, because why in the world would you give a shield of the kind I am describing, for a man to defend himself, if you imagine him standing by himself anywhere, if you imagine him any distance from the rest of the guys fighting alongside of him.

这点非常关键,那就是到底为什么要将,这样一种盾牌,给士兵们使用,想象一下这个场景,这个士兵在战场的某个角落孤军奋战,与其它友军士兵相隔甚远

耶鲁公开课 - 古希腊历史简介课程节选