Entitled the Seven Countries Study, it is considered one of the greatest studies of its kind ever performed.

它被称为“七国研究”，被认为是同类研究中有史以来最伟大的研究之一。

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Their study looked at the causes of disability among fifteen thousand people age sixty-five or older in seven countries.

VOA: special.2009.12.28

Well, unlike the choosiness studies, here we actually have some pretty good cross-cultural data So one study, for instance, was done in 10,000 people from thirty-seven countries, ?" asking people, "Who do you want to be with?"

与伴侣选择标准研究不同，我们事实上有一些很好的跨文化数据,例如，有一个调研,以来自37个国家的1万个人为调研对象，问他们“你最想和谁在一起“

耶鲁公开课 - 心理学导论课程节选

The study looked at reports from ten European countries from two thousand seven and two thousand nine.

VOA: special.2011.07.13

The study tracks 21 countries over seven years to 1990.

ECONOMIST: Working man��s burden

At the same time, about 30% of non-IT corporate employees violate the terms of security agreements they sign, according to another study performed by the firm, which surveyed hundreds of professionals in seven countries around the world.

FORBES: Accounting For Human Error

In one recently published study, six international research teams led by scientists from NOAA and a number of countries investigated seven different 2011 extreme weather and climate events.

CNN: Extreme weather and a changing climate