而肥胖在美国各社会经济阶层的发生率并不平均，以中等和中等以下收入群体为最多。
Obesity does not occur evenly across all socio-economic strata in the U.S.; it is far more prevalent in middle to lower income groups.
如到2011年取消大多数公共支付项目，对中等阶层实施各种各样的休假停工，提高针对高收入群体的税收标准以及延期一年发放国家养老金。
Most public-sector pay would be frozen in 2011, various middle-class breaks would go, rich people's taxes would rise and everyone would have to wait a year longer before getting their state pension.
而肥胖在美国各社会经济阶层的发生率并不平均，以中等和中等以下收入群体为最多。
Obesity does not occur evenly across all socioeconomic strata in the U. s.; it is far more prevalent in middle to lower income groups.
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