Danatan

One day, the teacher inquired of Peter:" How much is four minus four?"
一天,老师问彼得,"四减四等于多少?"
Peter was tongue-tied.
彼得结结巴巴的答不上来.
The teacher got angry and said: "What a fool! You see, if I put four coins in your pocket, but there is a hole in your pocket and all of them leak out, now what is left in your pocket?"
老师很生气的对他说,"你好蠢啊!你想想,如果有四个硬币在你的口袋中,但是口袋有一个洞,所有的硬币都掉出来,现在,有什么留在口袋中?"
"The hole," replied Peter.
"一个洞'.彼得回答道