计算复杂性的美在于它能够揭示问题的固有难度,而不管用于解决这些问题的具体算法是什么。
过去是一个无处不在的阴影。
时间是一个从我们感知变化的方式中衍生出来的概念。
To write is to breathe, and to breathe is to live.
The best books are the ones that children want to read again and again.
Collaboration across borders is essential to solving global food challenges.