牛角挂书【拼音】niú jiǎo guà shū【英文】read while grazing the cattle with one's books hung on its horns【释义】比喻读书勤奋。【出处】《新唐书·李密传》：“闻包恺在缑山，往从之。以蒲鞯乘牛，挂《汉书》一帙角上，行且读。”【用法】作定语；指勤奋读书【例句】我们要学习他～的读书精神
2，囊萤映雪
