English Original
One day, a teacher asked Peter, "How much is four minus four?" Peter was tongue-tied.
The teacher grew angry and said, "What a fool! Imagine I put four coins in your pocket, but there's a hole and they all leak out. What's left in your pocket?"
"The hole," replied Peter.
中文翻译
一天,老师问彼得:“四减四等于几?”彼得张口结舌,答不上来。
老师生气地说:“真笨!你想想,如果我往你口袋里放四个硬币,但你的口袋有个窟窿,硬币全漏掉了。那么,你口袋里还剩下什么?”
“窟窿。”彼得答道。