one day, a father and his little son were going home. at this age, the boy was interested in all kinds of things and was always asking questions. now, he asked, "what's the meaning of the word 'drunk', dad?" "well, my son," his father replied, "look, there are standing two policemen. if i regard the two policemen as four then i am drunk." 

一天，父亲与小儿子一道回家。这个孩子正处于那种对什么事都很感兴趣的年龄，老是有提不完的问题。他向父亲发问道：“爸爸，‘醉’字是什么意思？” “唔，孩子，”父亲回答说，“你瞧那儿站着两个警察。如果我把他们看成了四个，那么我就算醉了。”

"but, dad," the boy said, " there's only one policeman!" 

“可是，爸爸， ”孩子说，“那儿只有一个警察呀！”