规模报酬变化要求投入必须同比例变动，相比而言，规模经济只要求比较规模的扩大与单位产品平均成本间的关系。

Returns to scale changes must change with proportion to input, however, the economies of scale only requires the relation among the enlargement of the comparative scale and unit cost.

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首先，掺股比例不是固定的而是在一定的范围内变动的。

First of all, the proportion of doped shares not fixed but changes in a certain range.

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有效需求和货币数量不作同比例地变动。

Effective demand will not change in exact proportion to the quantity of money.

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