She repeated her experiment three times with similar results.

她在此后三次重复了这个实验，得到的是类似的结果。

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Sometimes they can be made to play fair (experiment three), sometimes the groups will unite against a common enemy (experiment one) and sometimes they will turn on the powerful group (experiment two).

有时候他们可以公平竞争(实验三)，有时他们会联合抵抗共同的敌人(实验一)，而有时他们又会联手对付更强大的那个团体(实验二)。

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In order to do this experiment, we're going to look at three short excerpts of popular entertainment.

为了做此实验，我们先来看三个大众文艺节目的片段。

耶鲁公开课 - 公正课程节选

Businessman With Idea Light BulbAnd so our three month experiment has come to end.

FORBES: What I Learned From Studying You

Seventy French university students were recruited for the study and told they would be participating in a three-day experiment testing the effects of brightness of video games on visual perception.

FORBES: Study: More Violent Video Game Play Results in More Aggression

For her experiment she studied the inheritance of three traits: a maroon coloured leaf marking, a white V-shaped leaf mark pattern, and the production of hydrogen cyanide in damaged leaves, which is thought to be a defence against predators.

UNESCO: Outstanding Student Award - Realise the Dream