因此建立供热成本核算和评估体系是非常必要的。
Therefore the establishment of cost accounting and evaluation of heating system is very necessary.
在建立绿色GDP核算体系时要注意其系统性、层次性、局限性和近似性，有目的地选择合适的评价指标和计算方法。
While establishing the green GDP accounting system, we must pay attention to its systematization, gradation, limitation and approximation, and choose the fittest indices and methods.
科学与公平地评价各种电力生产方式的前提是建立统一的成本核算概念、模式和方法体系。
The prerequisite of evaluating kinds of electricity generation technologies scientifically and fairly is to establish a unified conception, model and method of the generating cost accounting system.
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