同源词问题是汉语词汇史研究的重要内容，对同源词进行深入广泛的研究有助于揭示汉语词汇的系统性问题。
The problem of cognates is an important content in the research of the Chinese language history. Extensive researches in cognates will help us to reveal the systematicness of Chinese vocabularies.
为了进一步开展广泛而深入地研究，首先需要明确其主要基础理论及重要研究内容。
It is necessary to define its basic theories and major contents in order to further research about VRM.
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