What is the difference between a Turing machine and the modern computer? It's the same as that between Hillary's ascent of Everest and the establishment of a Hilton hotel on its peak.
He must learn to face his fears. He will not be three forever. And winter is coming.
The essence of mathematics lies in its freedom.
分组和组织的过程不是任意的,而是遵循明确的规律