A cohort study means you take the same group of people and follow them every five years for that period of time.

定群研究意味着你只有一组研究对象,然后在研究期间每五年进行一次记录数据

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

All of these from the group one and two through the group five and six elements, but what about elements, what about molecules like hydrogen, or nitrogen, or maybe oxygen?

所有的这些都是来自于第一主族和第二组主族,到第五主族和第六组主族的悬殊，那么元素呢，比如氢气，氮气或氧气那样的分子呢？

麻省理工公开课 - 固态化学导论课程节选

The first statements, either one through four or one through five depending on your counting, but the first group of statements concern Israel's relationship with her suzerain, with God. She's to be exclusively faithful to God. She's not to bow down to any manmade image.

第一部分声明包括前四条还是前五条,取决于你的数法，它是有关,以色列人和她的宗主她的上帝之间的关系的，她应该,把上帝当作唯一的信仰，而不能敬拜任何人造的偶像。

耶鲁公开课 - 旧约导论课程节选

When you start a company you might have had-- maybe when Peter Peterson and Stephen Schwarzman founded The Blackstone Group they gave each of them five hundred shares-- I'm just making that up-- but obviously there's going to be more shareholders as time comes in.

开办一家新公司时,你可能要...,当彼得·彼得森和史蒂芬·施瓦茨曼,创立黑石集团的时候,他们每人拿到了500股,这是我编的,显然,随着时间推移,会有更多股东

耶鲁公开课 - 金融市场课程节选

Well, a cross-sectional study would mean that you'd get a random group of the population and measure them in 1970 and then take another random group five years later and measure them, but it wouldn't be the same people necessarily, it would be different groups of people.

那么,横断面研究就是,1970年你在人群中随意选择一组人,并记录下相关数据,然后,五年后再随意选择一组人记录数据,但这不需要是同一组人,通常是不同的人

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选