求翻译：文中在对工程项目承包商选择相关理论评析的基础上，阐述了承包商选择的要求，及在工程项目承包商选择与评价中存在的问题；并比较分析了现阶段工程项目承包商评价的常用方法。是什么意思？

The article in the project contractor selection based on the theory of assessment, explained the requirements of the contractor selection, and the project contractor selection and evaluation problems; and comparative analysis of the evaluation stage, the project contractor used method.

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In the article in chooses the correlation theories evaluation to the engineering project contractor in the foundation, elaborated the contractor chooses the request, and the question which exists in the engineering project contractor choice and the appraisal; And the comparative analysis present sta

In the article comments on the choice of the contractor in theory on the basis of describing contractor selection requirements, and contractor selection and evaluation of existing problems; and comparative analysis of the commonly used method for evaluating contractor at the present stage.

In the article comments on the choice of the contractor in theory on the basis of describing contractor selection requirements, and contractor selection and evaluation of existing problems; and comparative analysis of the commonly used method for evaluating contractor at the present stage.