Quantum cryptography doesn't rely on the difficulty of mathematical problems, but on the fundamental laws of physics.

I find I'm so excited. I can barely sit still or hold a thought in my head. I think it the excitement only a free man can feel, a free man at the start of a long journey whose conclusion is uncertain. I hope I can make it across the border.I hope the Pacific is as blue as it has been in my dreams. I hope to see my friend, and shake his hand. I hope.

创新不仅仅是创造新产品；而是重新思考如何利用资源来建设可持续的未来。

The past is a foreign country; they do things differently there.

互联网的未来不在于技术，而在于人们如何使用它。

数学的真正力量在于它能够简化复杂的事物，并揭示宇宙的潜在模式。

At twenty-one, I was a divorced single mother. At thirty, I was struggling to feed my children. At forty, I was starting over in a new country. At fifty, I was rebuilding my career. At sixty, I walked the runway at Fashion Week. Life begins at every age—if you dare to make a plan.