可以看见一条金矿矿脉露出地面。
其中一种生活在五英里深的南非黄金矿脉里。
One type lives five miles deep in the bowels of South African gold mines.
含金矿脉主要由中等-最大微斜长石、石英、黄铁矿和微晶自然金等矿物组成。
The gold-bearing ore veins consist of microcline from intermediate to maximum, quartz, pyrite and microcrystalline natural gold.
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