But because each gallon of gasoline also generates external pollution costs, the total cost of that last gallon produced is higher than its value to consumers.
但是因为每加仑汽油包含了大量的污染成本，当市场达到平衡的时候，其生产成本是高于市场价格的。
Standardized costs for land, inputs, operational expenses and value of outputs are used to calculate total crop production costs and net income.
用统一的标准计算土地使用费，各种投入费用，生产管理费和产值，并计算生产总成本和纯收入。
Standardized costs for land, inputs, operational expenses and value of outputs are used to calculate total crop production costs and net income.
用统一的标准计算土地使用费，各种投入费用，生产管理费和产值，并计算生产总成本和纯收入。
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