The concept was invented by a group of students at Brown University in Rhode Island after a friend complained of waking up tired and performing poorly on a test.

这一概念是由罗德岛州布朗大学的一群学生创造的，因为他们的一个朋友抱怨说早上起来很累，考试发挥得很差。

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After the test, one group of people sat in a 3D virtual reality room for fifteen minutes with pictures and sounds of nature.

测试结束后，一组人在一个三维虚拟现实房间里坐了15分钟，观看大自然的图片，聆听大自然的声音。

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I usually define a group for each tester, and then create a test Manager group.

我通常为每个测试人员定义一个组，然后创建一个测试经理组。

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So the group started a competition called the National Geographic Bee to test students' knowledge about places around the world.

VOA: special.2009.05.29

And then he had them take a comparative and control group an intelligence test and a memory test.

然后他对比他们和对照组的,智力和记忆力测试结果。

哈佛公开课 - 幸福课课程节选

So, you didn't know at the beginning, you knew you were enrolled in the trial, they gave you a shot, you didn't know whether you were part of the real group that got the test vaccine or the placebo group that got the control; turned out that Bonnie was part of the control group.

一开始你可能不清楚全过程,你只知道你参与了一项试验,他们给你打了一针,你不知道你是属于接种了,试验疫苗的真实试验组,还是属于被注射了安慰剂的空白对照组,结果显示,邦妮属于对照组

耶鲁公开课 - 生物医学工程探索课程节选

So a group of test pilots got together and considered what to do.

NEWYORKER: The Checklist

In an article in the Huffington Post, he notes that at no time in the trial did the control group test a true low-fat diet.

FORBES: The Mediterranean Diet: The New Gold Standard?

Dr Sweeney's team, working in collaboration with Astrium, a satellite-and-space company that is part of EADS, a European aerospace group, will test the system in a large aircraft hangar in Germany.

ECONOMIST: Solar power from space