社会性媒体能够带来巨大挑战的原因之一就是它通常会挑战等级制度，而等级制度的上层人物已经习惯了舒适的上层生活。

One of the reasons social media can be so challenging is that it often challenges hierarchies... and people at the top of those hierarchies have grown comfortable there.

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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.

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然而，在博物馆里，精致的年代房只能反映那个时代上层阶级的生活方式。

Yet in museums, fine period rooms give only an image of the lifestyle of the upper class of that era.

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