historical division of period 历史分期
historical stage division 历史阶段划分
historical stages division 历史分期
Its historical division stresses the study of U. S. history and preservation of Americana.
其历史分部强调研究美国历史和保存有美国特色的文物；
Its very important to establish a proper standard and boundary point for historical division when we research the history of Economic Law.
研究经济法学史，恰当确定分期标准和界点是非常重要的。
It's very important to establish a proper standard and boundary point for historical division when we research the history of Economic Law.
研究经济法学史，恰当确定分期标准和界点是非常重要的。
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