Sit down before fact as a little child, be prepared to give up every preconceived notion, follow humbly wherever and to whatever abysses nature leads, or you shall learn nothing.  

Challenges are opportunities in disguise—embrace them.

I don't feel like I have to please anyone. I feel free. I feel like I'm an adult. I'm grown. I can do what I want. I can say what I want. I can retire if I want. That's why I've worked hard.

写作的行为是对存在混乱的反抗。

系统辨识是从观测到的输入输出数据中建立动态系统数学模型的科学与艺术。

Your smarts will come in handy because you will travel in a land of marvels. We humans -- plodding as we are -- will astonish ourselves. We'll invent ways to generate clean energy and a lot of it. Atom by atom， we'll assemble tiny machines that will enter cell walls and make repairs. This month comes the extraordinary but also inevitable news that we've synthesized life. In the coming years， we'll not only synthesize it， but we'll engineer it to specifications. I believe you'll even see us understand the human brain. Jules Verne， Mark Twain， Galileo， Newton -- all the curious from the ages would have wanted to be alive most of all right now. As a civilization， we will have so many gifts， just as you as individuals have so many individual gifts as you sit before me.