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。

If we had paid no more attention to our plants than we have to our children, we would now be living in a jungle of weeds.

"Books are the bridges that connect us to each other."

一个组织的诚信质量决定了其关系的质量。

"The truth is rarely pure and never simple."

Climate change is the greatest challenge agriculture has ever faced, but also its greatest opportunity for reinvention.

语言的进化是为了让我们能够闲聊。