国家中至少有三种社会阶层，上层阶级（执政），中产阶级（商人，管理者）和下层阶级（农民，工人）。

States had at least three social levels, usually, an upper class of rulers, a middleclass comprised of managers and merchants, and a lower class of crop producers and agricultural laborers.

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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。

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

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美国人普遍相信“美国梦”﹐这个梦的特征是各社会阶级的上下大幅度流动﹐尤其是由下层迁动至上层阶级。

American Dream, characterised by a huge-ranged vertical flow of the social classes, especially from the lower-class to the upper-class, is widely believed among the Americans.

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美国人普遍相信“美国梦”﹐这个梦的特征是各社会阶级的上下大幅度流动﹐尤其是由下层迁动至上层阶级。

American Dream, characterised by a huge-ranged vertical flow of the social classes, especially from the lower-class to the upper-class, is widely believed among the Americans.

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