marginal time cost of opportunity 边际时间机会成本
Of course, the two had poured significant time into the business, but the marginal cost of getting the business off the ground was close to zero.
当然，这两个人投入了大量时间来经营生意，但使商业起步的边际成本接近于零。
However, there are many firms that have market power or monopoly power, which means that they can increase their price above marginal cost and sustain sales for a long period of time. [1].
但同时许多企业具有一定的市场势力或者说是垄断势力，这意味着他们能够长期将价格定在边际成本之上。
The paper studied pricing strategy research of power plant based on real-time generating cost and system marginal price prediction under the deregulated power system.
本文研究了火电厂在电力市场环境下基于实时发电成本分析与系统边际电价预测相结合的发电企业报价策略研究。
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