In nineteen eighty-three, he began to study more than twenty-two thousand healthy male doctors over forty years of age.

VOA: special.2009.10.20

So when we talk about a cohort study, this means taking a group of people and following them over time.

所以当我们提到定群研究,就意味着,有一群人参加实验并需一直追踪下去

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

it's the study of how languages change over time.

它研究的是语言的历史变化。

我的专业 - SpeakingMax英语口语达人

The study involved forty-four traders and their profits and losses over a twenty-month period ending in two thousand seven.

VOA: special.2009.02.25

The study of human language has been the battleground over different theories of human nature.

人类语言的研究,是各种人性理论的重要领域

耶鲁公开课 - 心理学导论课程节选

I have over one hundred different kinds of birds from all over the United States in my study at home."

VOA: special.2010.04.03

And what he found was the students who were labeled-- randomly so, but who were labeled-- "fast spurters", their IQ increased significantly over the year and maintained that increase in a longitudinal study.

他发现被标签为-,被随机地标签为“快速迸发“的学生-,智商在一年间有很大增加,而且在长期研究中保持着增加。

哈佛公开课 - 幸福课课程节选

A recent study showed that RTS,S reduced clinical cases of malaria by fifty-three percent over an eight month follow-up period.

VOA: special.2010.04.20

She tried to study it and tried to figure out how it was that life insurance became more and more important over that century One of her conclusions was that life insurance seemed to be opposed quite a bit by women, nineteenth century women.

她试着研究这一现象,并试图揭示,在当时寿险的重要性,是如何获得人们的认可的,她的一项研究结论表明,女性似乎对寿险非常抵触,我是指19世纪的女性

耶鲁公开课 - 金融市场课程节选

Study leader Pooja Tandon says even small calorie reductions on a regular basis can prevent weight gain over time.

VOA: special.2010.01.27

This is a picture of Bill Kannell on the right and Bill Castelli on the left who were physicians who were very prominent in this Framingham Heart Study over the years.

右边是比尔·堪奈尔的照片,左边是比尔·凯斯特利,他们都是这么多年弗明汉心脏病研究中,表现杰出的医生

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The study found that one in five children over age two had a low risk of serious injury but received CT scans anyway.

VOA: special.2009.10.28

What they do in this study is they took this cohort of a hundred thousand nurses and then have followed them repeatedly over the years, with very careful assessments of diet, health status, and other things, and countless papers, important papers have been published from this particular cohort.

在研究过程中,他们以十万名护士为研究群组,很长一段时间内定期追踪她们的信息,包括关于饮食健康状况等的详细评估,同时还不断刊发基于这一研究群组,的重要论文

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

They used information gathered over a period of 20 years, until 2003, in the Framingham Heart Study.

VOA: special.2009.01.21

The study involved more than nine thousand women in the United States over the age of sixty-five.

VOA: special.2010.07.07

But she says the research does show the need to study whether or not there are long-lasting effects of repeated exposure over several years.

VOA: special.2011.03.02

A new study examines and compares adult death rates worldwide over the last forty years.

VOA: special.2010.05.05

She moved from butterflies to biochemistry, and her research over the past three decades has revolutionized the study of skin and skin diseases.

VOA: standard.2010.03.29

That's the finding in a new study that analyzed over 750 published studies on children's health the findings were base on data from 50 years studies from children health, and health care disparities "Racial and ethnic disparities in children's health care are quite extensive, pervasive and persistent."

VOA: standard.2010.04.07