哥伦比亚大学教授Ｒ·克拉斯经常回忆五十年前祖父讲的一个故事：一个寒冷的冬日，两位朋友漫步在大街上。其中一位不停地唠叨着，而他的同伴把两只冻僵的手插在衣袋里，只是不时地点着头。唠叨者终于忍不住问：希缨尔，你乍一声不吭？他的朋友应了一句：我忘了戴手套了。... Columbia University professor R. Crass often recalled one story his grandfather had fifty years ago: On a cold winter day, two friends strolled down the street. One of them kept nagging, and his companion inserted two frozen hands in his pocket, nodding only from time to time. Nagging finally could not help but ask: Greek Hill, you do not say anything? One of his friends should have said: I forgot to wear gloves. ...