Abstract : the dynamic calculation of the additional investment recovery period was discussed on the theoretical basis of the original compersation period calcuation . the investment recovery period in the design has been adopted to substitute the formerly prescribed standard time period . the results of the additional investment were evaluated and an optimal engineering plan is determined 文摘:在原抵偿年限计算的理论基础上，对追加投资回收期的动态计算进行探讨，采用了以设计方案的投资回收年限，替代原规定的标准年限值，对追回投资回收期的结果进行评价，从中选择最优工程方案
