The power of abstraction is that it allows us to ignore details that are not relevant to the task at hand.

The city is a great artifact, the supreme work of human civilization.

You think when you wake up in the mornin yesterday don't count. But yesterday is all that does count. What else is there? Your life is made out of the days it's made out of. Nothin else.

We must embrace change and innovate constantly.

爱国是恶人的美德。

包装的未来在于既能保护产品又能保护地球的材料。