However, problems still exist in researching work such as the unbalanced research distribution, improper methods and theories, historical data collection.
但其研究仍存在诸多不足，表现为研究状况严重不平衡、研究方法与理论把握以及史料收集与整理方面均存在很多问题。
However, problems still exist in researching work such as the unbalanced research distribution, improper methods and theories, historical data collection.
但其研究仍存在诸多不足，表现为研究状况严重不平衡、研究方法与理论把握以及史料收集与整理方面均存在很多问题。
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