他毕业之后一直研究国画的历史和理论的翻译：After graduation he has been looking into the history and theory of traditional Chinese painting 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

After graduation he has been looking into the history and theory of traditional Chinese painting

After he graduates studies the traditional Chinese painting continuously the history and the theory

He has been studying Chinese painting after graduating from the historical and theoretical

After graduation he has been looking into the history and theory of traditional Chinese painting