With the depletion of sulfide nickel mineral resources, the boom of exploration and utilization of laterite-nickel mine arrived.
随着硫化镍矿资源的日益枯竭，红土镍矿的开发利用热潮已经来临。
With the depletion of high grade copper mineral resources, it has become very urgent to develop the discarded copper tailings.
随着高品位铜矿资源的日趋枯竭，高效开发铜尾矿变得越发迫切。
With the depletion of high grade copper mineral resources, it has become very urgent to develop the discarded copper tailings.
随着高品位铜矿资源的日趋枯竭，高效开发铜尾矿变得越发迫切。
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