在国际关系研究领域，历史分析的核心问题是历史与理论之间的关系。
In the field of IR studies, the core issue of historical analysis is the relationship between history and theory.
二十世纪的历史表明，国际关系具有惊人的调整适应能力，而这种关系的基础是多边原则与准则。
Twentieth century history shows// the impressive adaptive capacity of international relations// based on multinational principles and norms.
国际关系史纷繁复杂，任何一种单一的理论视角都难以反映国际关系史的全貌，只有将不同的理论视角加以组合才能实现理论与历史的有效互动。
Any single theoretical perspective can 't explain the complexity of international history and the interaction between theory and history, unless merging different kinds of IR theories.
国际关系史纷繁复杂，任何一种单一的理论视角都难以反映国际关系史的全貌，只有将不同的理论视角加以组合才能实现理论与历史的有效互动。
Any single theoretical perspective can 't explain the complexity of international history and the interaction between theory and history, unless merging different kinds of IR theories.
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