The principle of demanding elasticity reflects the regularity of the relative relationship between the volume of commodity and the price.
需求弹性原理反映了商品量与价格相对关系变化的规律性。
It gives examples to analyze the change of demand elasticity has an influence over the sales volume of products and reaches a conclusion that how the price fluctuation influences the benefit sales.
举例分析了需求弹性变动对产品销售量的影响，得出了价格变动如何影响销售收益的结论。
There is a large volume of published studies describing the price and income elasticity on cigarette consumption.
有大量发表的研究描述了香烟消费的价格和收入弹性。
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