这个世界不是因为你能做什么，而是你该做什么。
物理学家的直觉就像复杂荒野中的指南针。
Over the centuries the Indians developed sign language for communicating phenomena of interest. Programmers from different tribes (FORTRAN, LISP, ALGOL, SNOBOL, etc.) could use one that doesn't require them to carry a blackboard on their ponies.