通过不同价格上的这样分解，我们能够将市场需求曲线表示为单个消费者需求曲线的横向加总。
By doing this for various prices, we can express the market demand curve as the horizontal sum of the demand curves of the individual consumers.
需求曲线——一个关联到商品数量或服务消费者愿望的与这个商品购买价格关系的函数。
Demand curve — a function that relates the quantity of a commodity or serve consumers wish to purchase to the price of that commodity.
需求曲线表明当单位价格的变化保持在一个非价格因素的恒定值上时，多数消费者在多大程度上愿意掏腰包去消费。
The demand curve shows how much of a good consumers are willing to buy as the price per unit changes holding non-price factors constant.
需求曲线表明当单位价格的变化保持在一个非价格因素的恒定值上时，多数消费者在多大程度上愿意掏腰包去消费。
The demand curve shows how much of a good consumers are willing to buy as the price per unit changes holding non-price factors constant.
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