如今网络上到处都是免费的教育资源，真正稀缺的是对学习的渴望。
Free education is abundant, all over the Internet. It's the desire to learn that's scarce.
70岁，我才刚刚开始。等着瞧吧。
In chemistry, as in life, the most transformative reactions often require patience and precise conditions.
最好的尚未到来。
The role of the artist is to ask the right questions, not to provide solutions.
平凡与非凡之间的区别就在于那一点点额外的努力。