One of the shocking realities in recent years is that America now has almost the lowest degree of social mobility of the high-income countries. Children born poor are likely to remain poor; children born into affluence are likely to be affluent adults.
近几年来出现的一个令人震惊的现实是美国的社会流动率在高收入国家中几乎垫底。生而平穷的孩子很可能死也贫穷，生而富足的孩子很可能死也富足。