边际成本（Marginal cost）
边际成本是指由于增加最后一单位产量导致的总成本的增加。
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- In economics, the marginal cost is the change in the total cost that arises when the quantity produced is incremented, the cost of producing additional quantity. In some contexts, it refers to an increment of one unit of output, and in others it refers to the rate of change of total cost as output is increased by an infinitesimal amount. As Figure 1 shows, the marginal cost is measured in dollars per unit, whereas total cost is in dollars, and the marginal cost is the slope of the total cost, the rate at which it increases with output. Marginal cost is different from average cost, which is the total cost divided by the number of units produced.
- 在经济学中，边际成本是生产数量增加时总成本的变化，即生产额外数量的成本。在某些情况下，它指的是一个单位产出的增量，而在其他情况下，它指的是总成本的变化率，因为产出增加了一个无穷小量。 如图 1 所示，边际成本以每单位美元来衡量，而总成本以美元为单位，而边际成本是总成本的斜率，即随产量增加的速率。 边际成本不同于平均成本，平均成本是总成本除以生产的单位数量。
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