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B1 Intermediate
Korean
9:10
Educational
탄소중립의 핵심, 수소(H₂)의 모든 것! 1화 - 수소의 생산과 저장 등 | 수소 전문가 장성호 실장이 자세하게 설명해 드립니다~
Learning Stats
B1
CEFR Level
5/10
Difficulty
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