科学的进步不是一条直线，而是一个螺旋，总是在前进，又总是回到起点。
I'm passionate about being alive and I won't waste my life being scared.
计算理论不仅仅是关于解决问题，还涉及理解可计算性的极限。
The key to sustainable economic development is the continuous improvement of human capital through education and innovation.
I have to be alone very often. I'd be quite happy if I spent from Saturday night until Monday morning alone in my apartment. That's how I refuel.
Over time, our emerging high-usage products will likely generate significant new revenue streams for Google as well as for our partners, just as search does today.