More recently,a group of experts examined studies of aspirin at the request of federal health officials in the United States.

VOA: special.2009.10.20

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

What this is, is you take a group of studies on an issue, you pool them all together, and then you weight studies differently depending on factors like how large they were, how good their methods were, and then you come out with overall estimates about the impact of something, in this case the Mediterranean Diet, on health outcomes.

所谓荟萃分析就是将某一问题的一组研究,汇总起来,并根据某些因素,赋予这些研究不同的权重,如基于研究的大小,研究方法的好坏等,然后得出关于某事物的影响的总体评估,在地中海式饮食中就是指健康结果

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Jillian York is also a member of the OpenNet Initiative, a group that studies Internet censorship and spying.

VOA: special.2011.02.07

Charles Haynes is a senior scholar at the First Amendment Center, a group that studies free expression issues.

VOA: special.2009.12.24

In July of that year, Darwin's friends Charles Lyell and Joseph Hooker had studies by both men presented to the scientific group called the Linnean Society of London.

VOA: special.2009.12.01

Hamish Fraser of the U.S.-based non-profit group Partners in Health, says several studies have demonstrated how the technology can help patients.

VOA: standard.2010.02.24