We can approximate the growth in total welfare of society as the simple weighted sum of the growth of income in each class . 把每个阶层的收入增长化为简单权数，我们可以估算出整个社会总福利的增长。
An astonishing number of spousesmost particularly in the upper-income bracketshave no close notion of their husbands' paychecks . 相当大一部分妇女特别在高收入阶层并不很了解他们丈夫的薪金。
The demand for bank services by the different classes differs more in the intensity of usage by the various classes than in the class themselves . 各不同阶层对银行服务需求表现在使用频度上而不表现在阶层本身上。
His lack of imagination and the narrowness of his social loyalties have ranged against him one of the fundamental estates of the realm . 他的想象力的贫乏，以及对社会的效忠范围的狭小，使他置身于这个王国中基本社会阶层的对立面。
It is interesting to note that the frequency of bronchitis and pneumonia in great britain has been correlated with area of residence in a polluted area and with social class . 值得指出的是，在英国，支气管炎和肺炎的发病率与污染区域中的居住地区和所属社会阶层有关。
A problem that cuts across all strata of society 一个影响到一切社会阶层的问题。
Social transformation amp; amp; social stratification 再论当代中国社会的阶层分化
