一个问题如果在计算机上可以快速解决，那么它属于P类问题；如果一个解可以快速验证，那么它属于NP类问题。

"The past is a foreign country; they do things differently there."

However difficult life may seem, there is always something you can do and succeed at.

The novel is a kind of mirror that reflects the world.

成功的衡量标准不仅是利润，还有积极的影响。

Talent is the most valuable asset of a bank, and we must focus on cultivation and motivation.

Mining with integrity means leaving the land better than we found it.