美国名校芝加哥大学的一位教授到访北大时曾提到:“芝加哥大学对学生的基本要求是——做困难的事。因为一个人要想有所成就,就必须做那些困难的事。”只有做困难的事,才能推动社会发展进步。历史上,具有划时代意义的重大变革,无一不是在解决前人遗留的巨大困难后得到的成果,不论是科学、经济、文化,还是政治上。 As a visiting professor at the University of Chicago, a professor at the University of Chicago said: “The basic requirement of students at the University of Chicago is to - do something difficult, because if one wants to accomplish something, one must do those difficult things. ”Only by doing difficult things can we promote social progress and progress. Historically, major changes of epoch-making significance have all resulted in resolving the great difficulties left over by our predecessors, whether scientific, economic, cultural or political.