弈秋,通国②之善弈者也.使弈秋诲③二人弈,其一人专心致志,惟弈秋之为听④；一人虽听之,一心以为有鸿鹄将至⑤,思援弓缴⑥而射之.虽与之俱学,弗若之矣⑦.为是其智弗若与⑧?曰：非然⑨也.”①选自《孟子·告子上》.弈秋...