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.

youdao

随着钢琴越来越普及，古典音乐也随之进入了中产阶级的生活，而在此之前，古典音乐只是为上层阶级创作的。

As pianos became more available, they brought classical music, the music which previously had been composed only for the upper classes, into the lives of the middle-class people as well.

youdao

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.

youdao

By keeping women under the household of the men of their original family, the upper-class Romans tried to balance these different households in size and importance.

所以女子保留娘家的家户关系，有助于罗马上层阶级,平衡不同家户的规模及地位。

耶鲁公开课 - 新约课程节选

So they would have local, sort of higher class, local elites, would bid for the right to collect local taxes, and so the Romans would take the highest bid.

所以他们安排当地人，算是上层阶级，本地精英，竞拍当地收税权，这样罗马总是能获得最高竞价。

耶鲁公开课 - 新约课程节选

They clearly serve the interests of an upper class.

他们很显然服务于上层阶级的利益。

耶鲁公开课 - 旧约导论课程节选