周末吃饭时间我都很随意的一般早上11点起床。。
恩格尔的原关键词是变动
而不是定值的比较
Engel's law does not imply that food spending remains unchanged as income increases: It suggests that consumers increase their expenditures for food products in percentage terms less than their increases in income.
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系统生成：由于楼层数受限，本帖实际回复的是 Fymm 的帖子 “我的理解是这样的”
原地址：http://bbs.huasing.org/sForum/bbs.php?B=107_14169432
Engel's law does not imply that food spending remains unchanged as income increases: It suggests that consumers increase their expenditures for food products in percentage terms less than their increases in income.
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系统生成：由于楼层数受限，本帖实际回复的是 Fymm 的帖子 “我的理解是这样的”
原地址：http://bbs.huasing.org/sForum/bbs.php?B=107_14169432
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