translation.en: So in the years leading up to the Second World War, the U.S. military buys 90,000 of these Norden bombsights at a cost of $14,000 each -- again, in 1940 dollars, that's a lot of money.
translation.zh: 所以在二战前几年 美军购买了九万件 这样的投弹瞄准器 每一个都价值一万四千美元－ 在1940年这可是大钱