经过20世纪初期以来几代学者的努力开拓和辛勤耕耘，中国近代史学科已经取得丰硕的学术成果。
Because of scholars industrious efforts, Research on Chinese Modern History has scored great successes since the early 20th century.
经过20世纪初期以来几代学者的努力开拓和辛勤耕耘，中国近代史学科已经取得丰硕的学术成果。
Because of scholars industrious efforts, Research on Chinese Modern History has scored great successes since the early 20th century.
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