楼主这是economics 101没学明白呀。食物价格对穷人的意义和对富人的意义太不一样了。恩格尔系数了解一下。

来源: SabrinaD 于 2025-06-11 14:09:00 [旧帖] [给我悄悄话] 本文已被阅读：次

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