America, and the world, is also facing a major structural problem, not unlike that at the beginning of the last century, when productivity increases in agriculture meant that a rapidly declining share of the population could find work there. Nowadays, increases in manufacturing productivity are even more impressive than they were for agriculture a century ago; but that means the adjustments that must be made are all the greater.
ampnbsp;ampnbsp;ampnbsp; 美国和整个世界还在面临一个结构性问题。这个问题有点像上个世纪初的问题一样。当时，农业生产效率提高意味着越来越少的人口可以务农为生。如今，制造业生产效率提高比一个世纪前农业产业的还要巨大，但是这意味着随之而来的调整也就更为巨大。