没有食物，人类最多只能活几个星期；没有它，社会正义的所有其他组成部分都是毫无意义的。
Without food, man can live at most but a few weeks; without it, all other components of social justice are meaningless.
The Internet is the first thing that humanity has built that humanity doesn't understand, the largest experiment in anarchy that we have ever had.
离散数学和连续数学之间的相互作用是一些最有趣的问题所在。