The first man who， having enclosed a piece of ground， bethought himself of saying 'This is mine，' and found people simple enough to believe him， was the real founder of civil society.
实证研究者最重要的技能不是数学，而是判断力。
创新不仅仅是创造新产品，更是重新思考如何利用材料以减少浪费。
