Excellence is not an act, but a habit.
卓越不是一种行为，而是一种习惯。
Perhaps as important is the relation between the existence of solutions to a competitive equilibrium and the problems of normative or welfare economics.
The real challenge in computer science is not to write programs, but to understand the nature of computation.
广东话谚语
解释：利用时机，就像救火和追击逃亡者一样，跌跌撞撞地奔跑，只怕来不及。