求翻译：　　即便是将动物和人置于绝望的环境中，人为地让他们无法逃脱失败或惩罚，仍然有四分之一个体永不放弃，这就是说，群体中天生地存在乐观差异，少数个体是最为乐观的。是什么意思？

Even the animals and placed in an environment of despair, artificially so that they can not escape failure or punishment, is still one quarter of the individuals never give up, That is, the population born optimistic about the difference a small number of individuals is the most optimistic.

Even if the animals and people in desperate circumstances, artificially that they could not escape from failure or punishment, there are still 4 of a self-employed will never give up, which is to say, in groups, inherently optimistic, and a few individual differences is one of the most optimistic.

正在翻译，请等待...

　　Even animals in the environment and people in despair, failed to artificially make it impossible for them to escape or punishment, there are still individual one-fourth never give up, that is, by nature optimistic differences exist in the group, a small number of individuals are the most optimisti