At the equator, where the Earth is widest, fifteen degrees stretches about one thousand six hundred kilometers.

VOA: special.2010.07.14

Another discovery which we'll talk about next week is-- Has anybody heard the phrase "six degrees of separation?"

我们下周还会讲他的另一个发现-,有谁听过“六度分隔理论”？

耶鲁公开课 - 心理学导论课程节选

Most people were able to get the packages to this man and it took at maximum six degrees of separation, which is where the famous phrase comes about that we're all separated from another person by six degrees of separation.

大部分人都能装包裹寄给这个男人,这个过程最多经过六度分隔，著名的六度分隔理论就是这样来的,这个理论是说人与人之间有六度分隔。

耶鲁公开课 - 心理学导论课程节选