long-run cost function 长期成本函数
long run average cost function 长期平均成本函数
long run marginal cost function 长期边际成本函数
We prove that the long run cost function is a power function of output, and point out the special relationship between long run marginal cost function and long run average cost function.
文章研究一般性齐次生产函数条件下长期成本函数的确定方法，证明了长期成本函数是关于产量的幂函数，并指出了长期边际成本函数和长期平均成本函数之间的特殊关系。
Its convenient long-distance maintenance function reduces manpower cost.
方便的远程维护功能，降低人力成本。
The electrical water kettle has the dry burning prevention function so long as added with a few of parts, and has simple structure and low cost.
该电水壶，只要加装少量零件，就具备了防干烧功能，结构简单，成本低。
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