力拓表示，正在将今年计划的资本支出增加25%，至50亿美元，以便加快煤炭和铁矿石项目的开发。
Rio said it was lifting planned capital expenditures 25% to $5 billion this year to accelerate coal and iron-ore projects.
并且，石油工业已经开发出可用于海底管道挖槽的遥控船，可以经过改造用来切割矿石，即使这些矿石在1.5千米以下也没问题。
The oil industry has also developed remotely-operated vehicles to make trenches for seabed pipelines, which can be adapted for cutting ore, even though it may lie much deeper, at, say, 1.5km down.
如今新开发的铜矿还不多，而随着旧铜矿开采的深入，上等品级的矿石已逐渐开采完，矿石品级已不如从前。
As older mines get deeper and the choicest parts of deposits become exhausted, ore grades have declined.
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