解释：天地没有完美的功效，圣人没有完备的能力，万物没有完备的用途。

Stay Hungry. Stay Foolish. And I have always wished that for myself. And now, as you graduate to begin anew, I wish that for you. 

过去永远在那里，而且每次你回头看它时，它都不同。

It was the best of times, it was the worst of times.

写作是一种生存方式。