2015年，一群来自中国和西班牙的选手创造了一项世界纪录：一座九人高的人塔。

In 2015, a group of players from China and Spain set a world record: a nine person high human tower.

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但是现在来自爱因斯坦医学院的一群研究人员有了一项新的发现——节食会导致大脑自噬。

But now a group of researchers from Albert Einstein College of Medicine have a new theory-dieting causes the brain to eat itself.

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回想当初，这群苗民都是战士——一项由中情局支持、长达15年的美国保密行动的秘密战士。

Back then, the Hmong were fighters—secret fighters in a 15-year covert US operation backed by the CIA.

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And a group of alumni decided to launch an initiative called the Civic Value Initiative.

一群毕业生决定发起一项活动,叫做，公民价值观行动。

普林斯顿公开课 - 人性课程节选