And there was the confluence of religion and business and science and all of these things that changed dramatically at about that period of time.

当时宗教，商业,科学等等都有了交叉点,它们在那个时期发生了巨大的转变。

普林斯顿公开课 - 人性课程节选

The interesting thing is that through time, as political winds change, these taxes have changed and they've gone up to some very high levels in the past in the United States and other countries.

有趣的是在不同时期,如果政策方向有所转变,税率也会改变,在过去的美国和其他国家,税率曾经相当高

耶鲁公开课 - 金融市场课程节选

Was it the world in which tradition says Homer himself lived, the transition first to the Archaic and then to the Classical Period, the period in which we think about the dawn of the polis?

或是那个传说中荷马曾经生活的时代吗,那个时代先经历了古代的转变,而后到了古典主义时期,也就是我们所说的城邦萌芽的时期

耶鲁公开课 - 古希腊历史简介课程节选