Quality is never an accident; it is always the result of intelligent effort.
学习数学的唯一方法就是做数学。
The difference between ordinary and extraordinary is that little extra.
最简单的解决方案往往是最优雅的。
技术是工具，用户才是核心。
自由不过是一个变得更好的机会。
The ocean doesn’t belong to us; we belong to the ocean. Our responsibility is to nurture it.
书是一个永远不会评判你的朋友。