The old professor used to digress from his subject for a moment to tell his students a funny story.
"老教授过去常常暂时离开一下话题,给学生们讲一个有趣的故事。"
The old professor used to digress from his subject for a moment to tell his students a funny story.
"老教授过去常常暂时离开一下话题,给学生们讲一个有趣的故事。"
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