This paper is an historical study of the concept of freedom.
本文对自由概念进行了学理考证。
Currently, this theory is a hot spot in the field of historical study.
目前，该理论是史学界研究的热点之一。
The second part was the historical study on American modern foundations.
第二部分是关于美国基金会的历史考察。
The second part was the historical study on American modern foundations.
第二部分是关于美国基金会的历史考察。
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