A dark mineral consisting of oxides of yttrium and erbium and tantalum and other minerals.

一种黑色矿物，由钇、铒、钽和其他矿物的氧化物组成。

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It consists of a mineral pedestal on which bases avolume of dark wood protected from the ground.

住宅黑色木质体量的底部是矿物基座，可以有效地防止木材遭到腐蚀。

youdao

Serpentinite is a dark green mineral used in decoration and jewelry. In nature, it is formed when sea water infiltrates into Earth's upper mantle, at depths that can reach 200 km in subduction zones.

蛇纹石是一种用来珠宝装饰的深绿色矿物，它形成于俯冲带，当海水渗入到地球上地幔的环境中，形成深度可达200km。

youdao

" "Exploitation of Congo's mineral resources continues to exacerbate conflict and instability on the ground and consumers are still largely in the dark as to whether or not their products are conflict free.

CNN: John D. Sutter,