4．对比困难效应（difficult comparison） 经济价值的概念是假设消费者能够真正比较所有的替代品
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Difficult Comparison Effect 对比困难效应
difficult comparison
比较困难的
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The first quarter of 2011 is up against an incredibly difficult comparison to Q1 2010.
FORBES: Box Office is Down 20%. Should Hollywood Panic?
Firstly, it faces a difficult comparison since the sales in the first three months of 2012 were unusually high.
FORBES: Weaker Sales Could Eat McDonald's Lunch In Earnings
The company has a difficult comparison with last year when there were many clearance sale events as goods bought under the previous management were sold off.
FORBES: J.C.Penney's Comeback Is A Farce So Far, And It Could Get Worse
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