I don't think you should ever regret anything. Everything happens for a reason.
The human being needs sadness as much as he needs joy.
理论计算机科学的美在于它能够抽象并解决看似不可逾越的问题。
True leadership means making tough decisions today for a better tomorrow.
经济学的第一课是稀缺:从来没有足够的任何一种东西能够满足所有人对其需要。政治学的第一课是摒弃经济学的第一课。