量子计算的挑战不仅是技术上的，也是概念上的。

History taught us is that people never know learn the lessons of history.

"Die Wahrheit ist oft komplizierter, als sie scheint."

The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labor which is necessary for its production, and not on the greater or less compensation which is paid for that labor.

身体记得心灵试图忘记的东西。