外国科学家曾经做过一次很有趣的试验：实验人员将一只青蛙冷不防地丢进煮沸的油锅里，这只青蛙在这千钧一发的生死关头，说时迟那时快，用尽全力，跃出了那必定使它葬身的滚烫油锅。半个小时后，实验人员使用同样大小的铁锅，在锅里放入五分之四的冷水，然后把那只刚刚死里逃 Foreign scientists once had a very interesting experiment: the experimenter accidentally dropped a frog into a boiling oil pan. The frog, at the critical juncture of life, said it was too late and exhausted. That must have made it a hot pan. Half an hour later, the experimenter used the same size wok, put four-fifths of the cold water in the pan, and then just just run away