They divided a bunch of volunteers into two groups.

研究人员将一群志愿者分为了两个小组。

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A team of scientists put their collective heads together and divided volunteers into groups of two to five.

一群科学家们将一些人聚集在一起，并按个人意愿分成两到五人的小组。

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The volunteers were then divided into three groups. Two began by reading a note dedicating the test to a recently deceased graduate student.

这些志愿者被分成三组，两组在开始前先读一则说明，说明中提到这个试验是为了一个最近刚刚去世的研究生。

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The 14 teams are divided into two groups of seven and after a round-robin section the top four from each group will go through to the quarter-finals.

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Over twelve weeks, researchers at the University of Indiana divided weight loss participants into two groups: a group that went to a traditional fitness center and a group that received their workout training and advice at a virtual gym through Second Life.

FORBES: Can Second Life Help You Lose Weight And Keep It Off?

They were then divided into two groups: the first was to undergo three sessions of HIT a week, for two-weeks, while the second acted as a control group.

BBC: Exercising