The marginal cost of producing wind power is almost nothing, since the fuel—wind—is free.
因为风是免费燃料，所以风能的边际成本几乎为零。
The cost of servicing free users must be lower than the dollar value they provide.
这些服务成本必须要低于它们所能带来的美元价值才行。
Therefore, I had known the cost of being free for France.
我估量过法国自由的代价。
Customers can download the demos and try them free of cost.
客户可以下载演示和尝试，他们免费的成本。
Best of all, it is free, except for the cost of a way to collect it.
除了收集它的成本，它是免费的，这是最好的。
Is dark energy the "cost" of having free space?
暗能量是空间存在的原因吗？
While in this form, the priest can cast any healing spell free of cost.
在这个状态下牧师的任何治疗魔法都不耗魔。
While in this form, the priest can cast any healing spell free of cost.
在这个状态下牧师的任何治疗魔法都不耗魔。
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