以下为句子列表：
英文: This article meaning is the discussion studies the market with mathematics method the change rule-precisely calculates the demand price elasticity to decide the commodity reduces prices or raises the price the behavior.
中文: 摘要探讨用数学的方法研究了市场的变化规律－即精确的计算需求价格弹性来确定商品的降价或提价行为。
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