组合数学是不用计数的计数艺术。
Combinatorics is the art of counting without counting.
The one thing that you have that nobody else has is you. Your voice, your mind, your story, your vision. So write and draw and build and play and dance and live as only you can.
死者试图与活者交谈,就像年长者试图与年轻者交谈一样。
真正的领导者不是创造追随者,而是创造更多的领导者。
世界是一个伟大的时钟,我们是其中的指针。