由于要考虑资金的时间价值，人工计算动态经济评价指标非常繁杂。

In view of the time value of fund, it is very miscellaneous to calculate the targets of dynamic economy evaluation.

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探讨了资金时间价值的概念、资金时间价值的衡量指标之一年金的概念、种类，着重对年金终值、年金现值的计算公式进行了推导。

In this paper, we have discussed the comprehension of the concepts the time value of money and the annuity that is one of the standard for distinguishing the time value of money.

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