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overburden /ˈaʊtə ˈlɪp/ n

中文：覆盖层

中文 · 覆盖层Español · relleno exteriorFrançais · morts-terrains
Meaning：Part of the ground that covers the ore beds; it is removed to reach the deposit.
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Found in these illustrated scenes（2）

Open-pit mine Open-pit mine

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