The two authors define the middle class abstemiously, as those who spend $2-10 a day, measured in 1993 purchasing-power-parity dollars.
两位作者发现这些中产阶层非常节俭，因为对比1993年美元购买力平价，他们每天生活仅仅花费2- 10 美元。
The two authors define the middle class abstemiously, as those who spend $2-10 a day, measured in 1993 purchasing-power-parity dollars.
两位作者发现这些中产阶层非常节俭，因为对比1993年美元购买力平价，他们每天生活仅仅花费2- 10 美元。
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