有这样一个故事,说的是一位心理学家,从亚马逊河畔带回两只猴子,一只瘦小体弱,一只体大健壮。他把两只猴子分别放在两个笼子里以同样的方式喂养,结果体大健壮的一只先死去了,他感到很奇怪,又托朋友从原地带回一只体大健壮的猴子,结果又死了,而那只瘦小体弱的猴子仍然活着。这位心理学家百思不得其解,于是亲自回到了亚马逊河畔探个究竟。结果发现: There is a story about a psychologist who brought back two monkeys from the shore of the Amazon. One was weak and one was physically strong. He put the two monkeys in two cages and fed them in the same way. The result was that the physically strong one had died first. He was very surprised and asked the friend to bring back a big, robust monkey from the original. It was dead again, and the thin and frail monkey was still alive. The psychologist was puzzled and he personally returned to the Amazon to find out. turn out: