The Moving Finger writes; and, having writ, Moves on: nor all thy Piety nor Wit Shall lure it back to cancel half a Line, Nor all thy Tears wash out a Word of it.
银河系中心是强引力下的一个独特的自然实验。
计算复杂性理论的发展向我们展示了并非所有问题都是平等的。
真正的诗人是能够用一个词捕捉一个瞬间的本质，并能够用一行表达无法表达的东西的人。
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.