如果愿意使用更复杂的模型，可以考虑加上现金的时间价值折算。

For those who would like to extend this to a more sophisticated model, consider adding in depreciation and the time value of money.

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使世界各地巨无霸的售价都统一折算成相同美元数的汇率是我们的公平价值尺度。

The exchange rate that leaves a Big Mac costing the same in dollars everywhere is our fair-value yardstick.

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现金流量折现(DCF)—使用NPV将预期现金收支折算到某一时间的价值。

Discounted cash Flow (DCF) - The value of expected cash receipts and expenditures at a common date calculated using NPV.

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