And when these groups were set in competition against each other, the Eagles versus the Rattlers, the within-group intensity grew.

当这两队小男孩,要与另一队互相竞争时，老鹰对响尾蛇，这种群内感情开始变强烈。

耶鲁公开课 - 心理学导论课程节选

Let's say, a little boy and a girl sit next to each other.

假设一个小男孩与一个小女孩是同桌。

The thing is 课堂 - SpeakingMax英语口语达人