A Useful Way
Father: Jack, why do you drink so much water?
Jack: I have just had an apple, Dad.
Father: What's that got to do with it?
Jack: I forgot to wash the apple.
中文：
爸爸：杰克，你干嘛喝这么多水呀？
杰克：我刚才吃了个苹果，爸爸。
爸爸：可是这跟喝水有什么关系呢？
杰克：我忘了洗苹果呀。