hongjeokcheung
diluvial formation
formation diluviale ; dépôt diluvial
홍적층은 지질학적 연구에서 중요한 역할을 합니다.
Hongjeokcheung-eun jiji-hakjeok yeongu-eseo jungyohan yeoghal-eul hamnida.
Diluvial formations play an important role in geological studies.
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