The greatest discoveries in mathematics are those that unify seemingly unrelated ideas.
"History is that certainty produced at the point where the imperfections of memory meet the inadequacies of documentation."
畜牧业的未来在于平衡生产力和动物福利。
《关睢》这首诗，快乐而不过分，哀婉而不伤恸。
君子的影响，五代以后就断绝了。