稀有矿物 meaning in English

rare mineral

In course of sinking the welt - shaft they came upon a deposit of a very rare mineral
在凿井中，他们，偶然发现一个稀有矿物的矿床。
In course of sinking the welt - shaft they came upon a deposit of a very rare mineral
在凿井中，他们，偶然发现一个稀有矿物的矿床。
In course of sinking the well - shaft they came upon a deposit of a very rare mineral
在把钻杆插入井下的过程中，他们意外地发现了一种稀有矿物的矿床。
These examples help explain why most environmental scientists believe that over the next few decades , the danger of degradation and exhaustion is greatest for potentially renewable resources , not nonrenewable resources ( except for petroleum and perhaps a few scarce minerals for which we can ' t find economically and environmently acceptable substitutes )
这些例子有助于解释为什么大多数环境科学家相信在今后几十年内，可再生资源被退化和枯竭的危险性是最大的，而不是不可再生资源（石油，还有少数几种我们未能找到经济和环保的代替品的稀有矿物除外）。