drumlin
noun [ C ] geology specialized uk/ˈdrʌm.lɪn/ us/ˈdrʌm.lɪn/
（通常指由冰河堆积成的一段椭圆形冰丘）冰堆丘
a small hill formed by a glacier (= mass of moving ice), usually with a stretched, oval shape and found in groups
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