求翻译：项目后评价是指对已经完成的项目或规划的目的、执行过程、效益、作用和影响所进行的系统的、客观的分析。本文主要是研究平西高速公路效益后评价。阐述了项目效益后评价的基本原理，依据效益后评价理论，使用平西高速公路实际的运营的费用-效益数据预测平西高速公路的费用-效益值。根据预测数据对平西高速公路进行财务评价和国民经济评价。同时，通过对平西高速公路的敏感性分析可以发现平西高速运用管理原因等，不断提出意见改进。是什么意思？

Refers to the purpose of the projects already completed or planned, the implementation process, effectiveness, role and influence of the system, an objective analysis of post-project evaluation. In this paper, post-evaluation study Pingxi highway efficiency. Expounded the basic principles of project

Post-project evaluation is done on the project or the purpose of planning, implementation, effectiveness, and impact of the role of the system, objective analysis. This document is primarily research-Highway after afternoon. After the project effectiveness, based on evaluation of the basic theory, e

The system, the objective analysis which after the project the appraisal is refers to which already completed the project or the plan goal, the implementation, the benefit, the function and the influence carries on.After this article mainly is the research sets the highway benefit to appraise.Elabor

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