What is the difference between a Turing machine and the modern computer? It's the same as that between Hillary's ascent of Everest and the establishment of a Hilton hotel on its peak.

"Das Geheimnis der Freiheit ist der Mut."

A distributed system is one in which the failure of a computer you didn't even know existed can render your own computer unusable.

树种多样性不仅仅是生态学，它是我们地球肺部的风险管理。