有一对双胞胎。其中一个过分乐观,而另一个则过分悲观。一天,他们的父亲买了许多色泽鲜艳的新玩具给悲观的孩子,又把乐观的孩子送进了一间堆满马粪的小房里。第二天清晨,父亲看到悲观的孩子正泣不成声,便问:为什么不玩那些玩具呢?“玩了就会坏的。”孩子仍在哭泣。父亲叹了口气,走进小房,却发现那乐观的孩子正兴高采烈地在马粪里掏着什么。“爸爸!”那孩子得意洋洋地向父亲宣称,“我想马粪堆里一定还藏着一匹小马呢!”有人画了一个圆圈,然后分别问乐观的孩子与 A pair of twins. One of them is overly optimistic while the other is overly pessimistic. One day, their father bought a lot of brightly colored new toys for pessimistic children, and put optimistic children in a small room full of horse dung. The next morning, when his father saw the pessimistic child sobbing, he asked: Why do not you play with those toys? “” When you play it, it will be bad. “” The child is still crying. Father sighed and walked into the cubicle, but found that the optimistic child was happily digging in horse dung. “Daddy!” The triumphant child declared to his father, “I think there must be a pony hidden in the horse dung!” Someone painted a circle, and then asked optimistic children and