This is a key moment in the evolution of revolutionary politics in Russia as we shall see a little later on.

这是俄国革命变革的关键时刻,我们之后会谈到这些

耶鲁公开课 - 欧洲文明课程节选

It was probably the pivotal point of our friendship when he realized I had actually spent some hours thinking about him and his troubles and he was trying to place that in his tremendously involved and tormented mental categories.

这或许是我们之间友谊的关键时刻,他知道我的确用了许多时间考虑他和他的困境,在他陷入极其复杂的痛苦的精神危机时,他更是急于想了解这一点。

耶鲁公开课 - 1945年后的美国小说课程节选

Which functions are crucial in defining the moment of death?

什么功能在定义死亡时刻时是关键的？

耶鲁公开课 - 死亡课程节选

So，the point is,every object falling under gravity is given by the same formula, but there are many, many objects that can have many histories, all falling under gravity, and what's different from one object and the other object is, when was it dropped, from what height, and with what initial speed.

关键是,每一个受重力作用下落的物体,都有同样的表达式,但是各个受重力作用下落的物体,都有不同的初始条件,所以它们的区别在于,下落时刻,下落高度和初始速度

耶鲁公开课 - 基础物理课程节选

Since what we had here was simultaneously losing both the ordinary body functioning and the special personality functioning, which loss was the crucial one in terms of defining the moment of my death?

我们这里同时失去了,平常的生理功能和特殊的人格功能，失去哪个是定义死亡时刻的关键呢？

耶鲁公开课 - 死亡课程节选