矿物种,指的是天然产出、具有一定的化学成分和有序的原子排列,通常由无机作用所形成的均匀固体。
金属矿物种类多但数量有限,包括银、金、铀、钨。
Mineral resources, varied but limited in amount, include silver, gold, uranium, and tungsten.
大约四百万年前生命诞生前,地球上的矿物种类被认为已超过1500种。
Over 1,500 minerals are thought to have formed on Earth before the beginnings of life some four billion years ago.
这也是Xstrata和英美资源经营的矿物种类如此繁多的原因。
It also explains why Xstrata and Anglo American operate so many different kinds of mines.
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