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drumlin n. 冰丘,冰堆丘 冰丘,冰堆丘 drumlin n 1: a mound of glacial drift Drumlin \Drum"lin\, n. [Gael. druim the ridge of a hill.]
(Geol.) A hill of compact, unstratified, glacial drift or till, usually elongate or oval, with the larger axis parallel to the former local glacial motion. [1913 Webster]
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