历史与逻辑统一，出自哲学领域，有其错误与弊端。
The proposition that history and logic is unified comes from philosophy and is mistaken.
论文采取的是一种历史与逻辑相统一和现实批判相结合的研究方法。
The research is carried out on the basis of the unity between history and logic and the realistic criticism as well.
本文在研究方法上，主要采用历史与逻辑相结合的方法和比较研究法。
In the research methods, mainly USES the method of history combining logic, and the comparative study.
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