释义：天地顺自然而动，所以日月运行不会有差错，四季的更替也不会有差错。圣人顺自然之理而动，则刑罚清明而百姓顺服。

Good design should be available to all, not just those who can afford it.

I’m a very positive thinker, and I think that is what helps me the most in difficult moments.

写作是记住，而阅读是忘记。

The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.

记忆是脆弱的，但它也是我们理解过去最强大的工具。

我失败了很多次，这就是我成功的原因。