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

Middle-class and upper-middle-class savers who will need to use the money themselves and expect to be taxed at lower rates in retirement plausible if they are moving from California to Nevada are usually better off with a pretax retirement account.

FORBES: Magazine Article

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