The experts said people with an increased risk of a heart attack should take a low-strength aspirin every day.

VOA: special.2009.10.20

One person might be a little low one day, another person might be high, a lot of people might-- you might happen to have captured them on an average day, but overall it averages out, so you get a representative sample.

一个人可能某一天少吃些,另一个人可能多吃些,很多人都会这样,你可能正好得出人们,平均每天的摄入量,但把它的整体平均一下,就得到有代表性的结果

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

For socialization, we designed the course so that at the beginning of the course and the end of the course the students were brought literarily from all over the world to New York and they spent a day with Professor Low and with each other.

为实现社会化,我们将来自世界各地的,学者聚集到纽约,并在课程开始和,结束的时候,让他们和Low教授,共同度过一整天。

麻省理工公开课 - 媒体、教育、市场课程节选