本文对污水处理工程的效益和费用作了简单分析以了解国民经济评价的意义。
This thesis analyses the costs and effects of a sewage treatment project to understand the implications of national economic evaluation.
整个系统包括数据分析、储量计算、经济评价及适当的图形显示。
The system involved data analysis, reserve computation, economical evaluation, some map view and online help.
过去在进行技术经济评价或固定资产折旧时，由于缺乏一套具体计算方法，通常只有定性分析，而无定量计算。
Since we are short of a systematic methods in economic apprise of technique and depreciation of fixed assets, we used to do qualitative analysis, never did quantitative analysis.
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