几十年来，李裕民教授在史学研究领域勤奋耕耘，收获甚丰。

Prof. Li Yumin has made great achievements in the field of history research in the past several decades.

youdao

几十年来，李裕民教授在史学研究领域勤奋耕耘，收获甚丰。

Prof. Li Yumin has made great achievements in the field of history research in the past several decades.

youdao