172铜在自然中与其他矿物和有价值的金属混合存在于矿石中，而且矿石中铜的比例可能有很大差别。
172copper occurs in nature mixed with other minerals and valuable metals in ore, and the proportion of copper in the ore can vary considerably.
第二，美国和西方同盟国在战略物质上有重要利益，像矿物质和矿石，这些需要从不发达国家，像是菲律宾进口。
Second, the US and its western Allies have a vital interest in strategic materials, like mineral and ore, which have to be imported from less-developed countries like the Philippines.
断层对于形成金子有着至关重要的作用。富含矿物质的水流在数亿年间不断冲刷裂缝，逐渐累积成了矿石。
A fault is essential for creating any deposit of gold, as mineral-rich fluids pumping through the fissure for eons gradually concentrate the ore there.
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