DontbeselflshDontbe selflsh别太自私A mother is admonishing her son.一位母亲在劝告她的儿子。Now ,John ,dont be selfish. Let your little brother share the bicycle with you听着，约翰，别太自私，让你弟弟和你共用一辆自行车.But Mother，I do.I ride it down the hill, and he rides it up the hill“妈妈，我是让他。我先骑下坡，他再骑上坡。”
