过去从未死去，它甚至还没有过去。

The quantum Fourier transform is the key to the exponential speedup in Shor's algorithm.

The truth about the world is that anything is possible. Had you not seen it all from birth and thereby bled it of its strangeness it would appear to you for what it is. A hat trick in a medicine show. A fevered dream. A trance bepopulate with chimeras having neither analogue nor precedent. An itinerant carnival. A migratory tentshow whose ultimate destination after many a pitch in many a mudded field is unspeakable and calamitous beyond reckoning.