Success comes from knowing that you did your best to become the best that you are capable of becoming.

自然的韧性给了我希望。

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.

Never stop questioning—that’s where progress begins.

从n对观测值的样本中获得的相关系数的可能误差是sqrt((1-r²)/(n-2))。