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

That means that they've never declined as much in one month before; our data started in 1987.

那意味着它们从来没有在,一个月之内下降过这么多；,我们从1987年就开始记录数据了。

耶鲁公开课 - 金融市场课程节选

So, he says to Marsden, take these data.

他对马登斯说，记录这些数据吧。

麻省理工公开课 - 固态化学导论课程节选

And then you can look at food disappearance data and that's sort of a connection with the food production data: not so much how much is produced but how much of it is disappearing from the--the food supply.

然后看看食物消耗的记录,会与食物生产的数据,有某种联系,与其看在食品供应中生产了多少,倒不如关注被消费了多少

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

That's when a new manager appears subsequent to the beginning of the ten-year period; they'll put not only the new numbers in, but they'll take the history of the new manager and put that history into the database.

即在10年期开始后,每出现一位新的基金经理,不仅是新的业绩数字会进入数据库,新经理的历史记录,也会填入数据库

耶鲁公开课 - 金融市场课程节选

Now when I asked you to start keeping the dietary records, I asked you not necessarily to change your food intake because we wanted you to have an accurate record of what you typically ate.

当我让你自己保留饮食记录,我告诉你没有必要改自己的食物摄入记录,因为我们想获得准确数据,关于你一般吃什么

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

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