At the same time,they agreed to make the G20 the main group the "premier forum" to guide international economic cooperation.

VOA: special.2009.10.02

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

The source doesn't tell us that, and in fact there's really no archeological evidence of a group, a large group, entering the land of Canaan at this time.

资料来源并没有告诉我们，事实上，并没有考古学证据表明,有一个部族，大部族在那个时候进入迦南。

耶鲁公开课 - 旧约导论课程节选

At the same time, the nation's biggest insurance company, American International Group, had gotten into trouble selling credit default swaps.

VOA: special.2009.01.02

A cohort study means you take the same group of people and follow them every five years for that period of time.

定群研究意味着你只有一组研究对象,然后在研究期间每五年进行一次记录数据

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 group says this was the first time it gave a documentary crew unrestricted access to its field operations.

VOA: special.2010.07.26

But also, the students put in actually more time into the class and they outperformed the control group.

而且学生对课业,付出更多时间，成绩比对照组好。

哈佛公开课 - 幸福课课程节选

The researchers also found tools used by the Clovis culture, a group of human beings who lived at that time.

VOA: special.2009.01.20

We'll make them the control group this time.

这次我们让他们作为控制小组。

耶鲁公开课 - 心理学导论课程节选

Every time the friends try to speak, another group of people starts singing the word SPAM very loudly.

VOA: special.2009.04.19

When you bring a group of your friends back to your house, you're expecting to have a good time, : and your grandparent is there and says, "Oh, it's so good to see a bunch of young people.

当你带着,一群朋友回家，想要狂欢一下，但你的祖父母在家并说，“噢！看到一群年轻人真好。

耶鲁公开课 - 政治哲学导论课程节选

International students often want to spend their free time with friends from their own country or group.

VOA: special.2009.03.19

Sure, for the first time this year, there's an outdoor group studying at the Hillel, the Jewish Center. I think it really was inspired by this outdoor spirituality series, which is wonderful.

好的，今年户外活动项目，第一次在Hillel的犹太中心，进行小组学习,这一系列户外灵性活动真的给了我们很多灵感，这是个非常棒的项目。

普林斯顿公开课 - 人性课程节选

Paul liked to spend as much time as he could at the theater where Charley Edwards and his group acted in their plays.

VOA: special.2009.04.04

Any time you see a c h 3, this means a methyl group.

一旦你看到一个，C，H，3，的组合，这就意味着一个甲基。

麻省理工公开课 - 化学原理课程节选

By the time Hank was fourteen, he had already put together his own group of musicians.

VOA: special.2009.11.22

But also you'd think that if there was a group of people that really had been attending the calories it would be this group, because very few people who come in for weight loss are doing it for the first time, so almost everybody has been on lots of different dietary attempts and somewhere along the line they've been doing calories.

想一想,如果世界上还有一群人,真正关注卡路里的话,那就是肥胖人群,因为那些参加减肥项目的人中,很少有人是第一次参加,几乎人人都进行过多次不同的饮食控制,他们也尝试过计算卡路里减肥

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Since that time, the group has been planning and performing all kinds of puppet shows.

VOA: special.2009.09.23

It was the first time a black singer performed regularly with an American opera group.

VOA: special.2009.01.25

She admitted that she got married the first time only to escape from being forced to live in a group home for children without parents.

VOA: special.2009.12.06

The group was active in the social protest and union movements of the time.

VOA: special.2010.01.25

By the time he was thirteen, James Brown had formed his own music group.

VOA: special.2010.05.16

The results suggested that people do act differently if they think they are working with a group for a short period of time instead of a long period.

VOA: special.2009.03.03

Army commanders say it is only a matter of time before the Taliban-style group would be completely destroyed.

VOA: standard.2009.07.30

That invitation was also extended to a group of North Korean artists, who are displaying their work in Australia for the first time.

VOA: standard.2009.12.09

Terribly dynamic and largely a very young group of players who are going to be competing in the Olympics most of them for the first time,"

VOA: standard.2010.01.12

He had only the 17th-fastest qualifying time, but he emerged from the four rounds of group racing to take the title, edging Canadian Mike Robertson at the finish.

VOA: standard.2010.02.16

Senior manager Tshepo Ramodibe said the group hopes to use the upcoming football World Cup, being played for the first time on African soil, to broaden awareness of the disease and the way it can be prevented and treated.

VOA: standard.2010.04.23

The G20,which includes major industrialized powers in the Group of Eight plus developing nations with significant economies such as China and India, agreed to a specific time line for deficit reduction, while giving governments flexibility to adjust the pace of changes based on their own situations.

VOA: standard.2010.06.27

And I think that will stand the test of time." State Department officials traveling with Secretary Clinton say she also discussed the Group of Eight leading industrialized nation's That money is in addition to emergency humanitarian programs, and is meant to fight hunger by enabling small farmers to produce more of their own food by improving productivity.

VOA: standard.2009.08.16