沉积于冰前湖底或海底的细粒沉积物中间的大石块。

A large rock fragment, deposited in the midst of the fine-grained sediments on the floor of a proglacial lake or of the sea.

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沉积于冰前湖底或海底的细粒沉积物中间的大石块。

A large rock fragment, deposited in the midst of the fine-grained sediments on the floor of a proglacial lake or of the sea.

youdao