The teaching and research of the World history is an important part of the teaching and research of history.
高校世界史教学和研究是历史教学和研究的重要组成部分。
He worked on history research and teaching all of his life.
他毕生专事历史研究和教育工作。
The open class teaching has a long history as a form of teaching and research.
作为一种教研形式，公开课由来已久。
The open class teaching has a long history as a form of teaching and research.
作为一种教研形式，公开课由来已久。
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