I think there's a simple story which is very different from what's causing the current apparently current recession.

我认为这里有一个简单的故事，一个不同于,现在的经济衰退的故事，导致现在这个危机。

耶鲁公开课 - 金融市场课程节选

You can see how they moved from that definition of probability to the current definition.

所以你可以清楚地了解到,概率是如何由那个定义,转变为今天的定义的

耶鲁公开课 - 金融市场课程节选