translation.en: I did some quick calculations. I took the last 20 years of GDP growth and the last 20 years of labor-productivity growth and used those in a fairly straightforward way to try to project how many jobs the economy was going to need to keep growing, and this is the line that I came up with.
translation.zh: 我进行了一些计算。我直接运用过去二十年GDP增长 和劳动生产率增长的数据 尝试预测 我们需要多少工作机会才能保证 经济的持续增长，最终的结果就是这条曲线。