测试程序的最好方法是测试它。

你做得越多，学到的就越多。你学到的越多，你能做的就越多。

Life is composed of lights and shadows,and we would be untruthful,insincere,and saccharine if we tried to pretend there were no shadows.

秘诀在于准备。

常反省自身，少议论他人，是最高级的修养。