过去从未死去。它甚至不是过去。
For in the final analysis, our most basic common link is that we all inhabit this small planet. We all breathe the same air. We all cherish our children's futures. And we are all mortal.
Silence is the most perfect expression of scorn.
我们需要能够信任互联网的基础设施。
A problem is in P if it can be solved quickly by a computer, and in NP if a solution can be verified quickly.