This week on our program, we talk about the growth in the Hispanic population, America's largest minority group.

VOA: special.2011.06.13

What this does, when you use relative risk you take some group of the population and you establish their risk as--at one.

当运用相对危险度这个概念时,要选定一个群组,并把这个群组的风险设为1

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So more than doubling the risk can certainly site to the population Now these kind of results show how important it is to do studies that don't group everybody in the population together.

由图可见,发病率差异量超过一倍,这些研究结果表明,在研究过程中分组的重要性

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

A group of Venetian residents concerned about this marked the city's population decline with a mock funeral procession.

VOA: standard.2009.11.14

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

Ibrahim,who believes that the alienating tactics of al-Shabab has already turned the majority of the Somali population against the rebel group, says that this latest attack is a significant blow to the Mogadishu government.

VOA: standard.2009.12.05

"There is an element of truth in that,". "But the option to simply starve a large population of civilians because you have a parasitic insurgency group attached to them is not a choice.

VOA: standard.2009.04.26

"When you can't say for sure whether all the women in the advance provision group actually used the medication, then you're kind of looking at population level effect of a strategy, not the individual effect of a medication."

VOA: standard.2010.03.22