无论是哪一种研究方法，都必须坚持客观性原则。
The principle of objectivity has to be stuck to in the choice of research method.
历史学之所以可能保持一种客观性原则，就在于它追求一种理想的境界。
The fact that history may maintain an objective principle lies in the fact that it .
历史学之所以可能保持一种客观性原则，就在于它追求一种理想的境界。
The fact that history may maintain an objective principle lies in the fact that it .
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