税务压倒了中产阶级的下层。

This tax bears down on the lower middle class.

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进行这样的研究的原因为了准确分析社会中产阶级中哪部分人群（中产阶级的下层或高层）在商场购物的次数和购物量更多。

The reason for conducting such a research is to find out which sections of the society (lower middle class or higher middle class) do a lot of shopping in the malls.

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到目前为止，它只帮助了中产阶级，而没有帮助庞大的下层阶级，后者仍然面临恐吓和暴力的风险。

So far, it's helped only the middle class, not the massive underclass, which remains at risk of intimidation and violence.

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