在北京大学沉浸于百年校庆的欢乐气氛时,4位世界“顶尖级”华人科学家杨振宁、李远哲、朱棣文、丘成桐来到北大,为近千名师生作了3个小时的精彩演讲。笔者有幸倾听了演讲的全过程,虽已事隔多日,仍觉余音绕梁,记忆深刻。这4位科学家都是中国科学院、美国国家科学院院士,其中杨振宁、朱棣文和李远哲分别是诺贝尔物理奖和化学奖获得者,丘成桐曾荣获国际数学界最高奖菲尔 When Peking University was immersed in the joyous atmosphere of a hundred years of celebration, four world-class top Chinese scientists Yang Zhenning, Li Yuanzhe, Steven Chu and Yau Shing-tung came to Peking University to make three-hour speeches for nearly a thousand teachers and students. I was fortunate enough to listen to the whole process of speech, though it has been a long time since, I still feel the reverberations around, memorable. The four scientists are Chinese Academy of Sciences, the National Academy of Sciences of the United States, of which Yang Zhenning, Steven Chu and Li Yuanzhe Nobel Prize in Physics and Chemistry Prize winner, Yau have been awarded the highest award in international mathematics Phil