A mother is admonishing her son. 

　　Now, John, don't be selfish. Let your little brother share the bicycle with you. 

　　But Mother, I do. I ride it down the hill, and he rides it up the hill. 

　　别太自私 

　　一位母亲在劝告她的儿子。 

　　"听着，约翰，别太自私，让你的弟弟和你共用一辆自行车。" "妈妈，我是让他。我先骑下坡，他再骑上坡。"