我唯一确定的是我一无所知。
The only thing I'm sure of is that I know nothing.
儿童值得拥有既让他们高兴又挑战他们的艺术。
Success in the aggregates industry is not just about moving rocks; it's about moving the economy forward.
The best way to understand a program is to try to change it.
The biggest risk is not taking any risk. In a world that's changing quickly, the only strategy that is guaranteed to fail is not taking risks.
The study of complex systems has taught us that simple rules can give rise to incredibly complex behavior.