一组来自美国，英国，德国和挪威实验室的研究人员利用成像仪扫描一群志愿者的大脑，这些志愿者正被进行一个叫边锋的测试。

A team of researchers from laboratories in America, Britain, Germany and Norway used an imaging machine to scan the brains of a group of volunteers who were set a "flanker" test.

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为了一探究竟，罗登布希博士让一群志愿参与实验的人食用85克的牛奶巧克力，并要求另一组实验对象完全不吃巧克力。

To find out, Raudenbush had a group of volunteers eat 85 grams of milk chocolate. He asked another group to eat no chocolate at all.

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第一组试验中，一群老鼠被置于一个装有能提供食物的操纵杆的笼子里，当老鼠推动操纵杆的时候，一滴液体食物(含有淀粉或糖的液体)就会掉出来。

In the first model, a group of mice were put in a cage with levers that dispensed food. When the mouse pushed a lever, a liquid treat — either a starchy or a sweet liquid — came out.

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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

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If you were searching for unique populations of cells within the bone marrow what tools would you use to look for them?

如果你要在骨髓中,找一组特定的细胞群,你用什么工具来找呢

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One group of children was a control group; the second group was taught to think back to experience that make them laugh or smile.

一群小孩组成对照组;,有人教第二组小孩回想,让他们大笑或微笑的经历。

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