If we allow ever-young in this world, who are willing to accept this sinistrous gift?
如果允许我们在这个世界上长生不老,试问谁愿意接受这件不吉祥的礼物?
Time is not a thing, thus we can neither waste nor save it; it is always with us.  
理论计算机科学中的挑战不仅仅是解决问题,而是理解为什么它们难以解决。