In terms of class, digital divide exists among different types of workers and between the upper and middle classes and the lower class.

在阶级方面，不同类型的工作者，以及中上层阶级和下层阶级之间，都存在着数字鸿沟。

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The grand mediocrity of today—everyone being the same in survival and number of offspring—means that natural selection has lost 80% of its power in upper-middle-class India compared to the tribes.

当今人与人在很大程度上的平等——即面对自然淘汰法则人人机会均等，并且连子嗣的数目都一样——意味着和在印度土著部落中的情况相比，印度中上层阶级中已丧失了80%的自然选择中的优势。

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The magazines accorded some legitimacy to East End working-class theaters that mirrored the format of the fashionable West End theaters serving middle-and upper-class audiences.

杂志给予了伦敦东区工人阶级剧院一些合理性，这些剧院反映了时尚的伦敦西区剧院（为中层和上层观众服务）的设计风格。

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The average wealth and education of voters in the Defence area meant that NA-250 was the place where PTI, which appeals to middle-class and upper-middle-class voters fed up with traditional patronage politics, stood its best chance of winning a seat in Karachi, the country's economic capital.

WSJ: Karachi Killing Shakes District Amid New Vote

Passports and foreign vacations, once unthinkable for anyone but high officials or their well-connected kin, are now commonly enjoyed by upper-and middle-class Chinese.

ECONOMIST: China

At the same time, Mr Chidambaram estimates that he will earn huge revenues in 2013-14 by taxing the super-rich and upper-middle class.

BBC: India's budget: A deft balancing act