The P versus NP problem is one of the most important problems in computer science.

"I never set out to create a classic. I just wanted to tell a story."

我们今天开采的石料，就是留给后世的遗产。

I'm not a role model... Just because I can sing doesn't mean I should raise your kids.

写文章必须追溯六经的源头，并参考诸子百家和史书的写法。