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B1 Intermediate
Chinese
29:59
Educational
《遗迹有奇迹》01 洞见山河：六万建设者隐姓埋名18年 打造出世界最大的人工洞体——816地下核工程【CCTV纪录】
Learning Stats
B1
CEFR Level
5/10
Difficulty
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