In the mid 1940s the process to produce uranium- 235 was scaled up from lab to plant with a scale-up factor of 1061.Obviously this is a big risk, but so were the perceived returns.

• 40年代中期，生产U-235的工艺从实验室规模到工厂规模的放大系数是1061显然这是个大冒险，不过也收到了大回报。