translation.en: Von Neumann, in the '50s, did the same thing for computing; he showed you can have an unreliable computer but restore its state to make it perfect. This was the last great analog computer at MIT: a differential analyzer, and the more you ran it, the worse the answer got.
translation.zh: 冯·诺依曼在50年代的时候，也做了同样的事情 他说，你可以有一台不可靠的电脑，但是你可以将其状态恢复到完美 这也是MIT的最后一台大型模拟计算机 用的是微分分析器 运行次数越多，其准确度越低