As the fat part of the bell curve of income inequality moves beyond the middle-class threshold, huge numbers are lifted out of poverty.Yet many of them are still perilously close to the borderline.

• 收入不平等的正态分布曲线最大的一部分从中产阶级底线中移开，由此，大量中产阶级摆脱了贫困，尽管如此，十分靠近边界的也不在少数。