An elongated hill or ridge of glacial drift.
鼓丘长形小山或冰碛丘
The uranium deposits are obscured by sand, peat and glacial drift.
铀矿床被砂子，泥炭和冰碛物所覆盖。
One of a series of short scars made by glacial drift on a surface of bedrock.
冰川漂流物在基岩表面留下的一系列短痕之一。
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