Group 5 is a normal control group.

实验5组为正常对照组。

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For the study, 325 employees spent six months taking part in ROWE, while a control group of 334 employees continued with their normal workflow.

在这项研究中，有325名员工花了6个月的时间参加 ROWE ，而对照组的334名员工则继续以正常的流程工作。

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Morris and her team put one group of rats on a high-fat diet. A control group was fed a normal diet.

莫里斯和她的研究团队让一组老鼠摄入高脂肪的食物，而对照组的老鼠则用正常的食物喂养。

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We found that, compared with 32 normal people in a control group, psychopaths had an 18% smaller amygdala, which is critical for emotions like fear and is part of the neural circuitry underlying moral decision-making.

WSJ: Neurocriminology: Inside the Criminal Mind

For example, one of the most widely cited intervention studies on soda and weight, ( Ebbeling et al. 2006) took 103 adolescents aged 13 to 18 who regularly consumed soda and randomly assigned them to either a group that received no calorie beverages for six months by way of home delivery or a control group that carried on drinking soda as normal.

FORBES: ABC News Attacks Scientist Who Exposed Bias In Obesity Research

Each one is naturally rich in vitamin E - and other potentially important minerals - and for each there is a similarly tasting "normal" soup that could be used for the control group of pregnant women.

BBC: 'Super soup' test in asthma trial