donggulhak
speleology
spéléologie
동굴학은 동굴의 형성과 생태계를 연구하는 학문입니다.
donggulhak-eun donggul-ui hyeongseong-gwa saengtaegye-reul yeongu-haneun hakmun-imnida.
Speleology is the study of the formation and ecology of caves.
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