求翻译：文献法也称历史文献法，就是搜集和分析研究各种现存的有关文献资料，从中选取信息，以达到某种调查研究目的的方法。是什么意思？

Journal of Law, also known as historical documents and laws, is to collect and analysis of existing relevant literature, from which selected in order to achieve the purpose of a research method.

Also known as historical literature literature law law is the collection, analysis and study of the various existing relevant documentary information from which to select information, in order to achieve a certain kind of investigation and research purposes.

The literature law also called the historical document law, is the collection and the analysis studies each kind of extant related literature material, selects the information, achieves some kind of investigation and study goal the method.

Literature method also known as a historical document method, is the collection and analysis of existing information on the document, select a message in order to achieve a research purpose.

Literature law calls the law of historical document too, it is to collect and analyze and research various extant relevant documents and materials, choose the information from it, so as to achieve the purpose method of a certain investigations.