Quantum cryptography doesn't rely on the difficulty of mathematical problems, but on the fundamental laws of physics.
先验与后验的区别是认识论的，而非形而上学的。
Every great advance in science has issued from a new audacity of imagination.
我想知道，当亲吻不得不停止时，灵魂还剩下什么？
"The future is about making technology work for people."