知识产品生产具有巨大成本递减机制等。
Knowledge product production has the huge cost mechanism of successively decrease.
产出越大，平均成本越低；当平均成本是产出递减函数时，边际成本总是低于平均成本。
When average costs decline in output, marginal cost is always less than average cost.
产出越大，平均成本越低；当平均成本是产出递减函数时，边际成本总是低于平均成本。
When average costs decline in output, marginal cost is always less than average cost.
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