So here's how well off you are, here is time, and you start with nothing and you end up incredibly well off.

纵坐标代表你的处境，横坐标代表时间，你从一无所有到辉煌腾达。

耶鲁公开课 - 死亡课程节选

And what we find, the first example of a Bronze Age-- and I use the word civilization now for the first time, because before the Bronze Age-- there is nothing that we would define as civilization.

我们发现的第一个文明出现在青铜时代,也是我第一次用文明这个词,因为在青铜时代之前,没有任何东西能称之为文明

耶鲁公开课 - 古希腊历史简介课程节选