广播电视英语短句 第 279 课：囚徒困境-2

The students played in groups of four. 学生们在游戏中每四人一组。

Each player could win points for the group, so they would all gain equally. 每个玩家都能为集体赢分，他们都能平等的得分。

But each player could also reward or punish each of the other three players, at a cost to the punisher. 但每个玩家也能作为惩罚者，奖励或惩罚其他三位玩家。

Harvard researcher David Rand says the most successful behavior proved to be cooperation. 哈佛研究人员David Rand称最成功的行为时合作。

The groups that rewarded it the most earned about twice as much in the game as the groups that rewarded it the least. 奖励最多的团队得分是奖励最少团队的两倍。