定理是数学的里程碑。

We are all haunted by the shadows of our former selves.

读书时刻苦用心，才能达到一字千金的层次。

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.

创新发生在技术与真实需求相遇的时候。

最终，我们都只是在努力生存。