种一棵树最好的时间是20年前，其次是现在。
The best time to plant a tree was 20 years ago. The second best time is now.
The future of computing lies in the integration of hardware and software.
To men like that, time was a surfeit, a barrel they watched slowly drain. When really, he thinks, it’s a glowing puddle you carry in your hands; you should spend all your energy protecting it.
写作是一种不被中断的说话方式。
广义相对论在某种意义上就是引力场的理论。
释义：做事情必须踏踏实实，不要追求浮华的虚名。