Borehole hydromining is a kind of safe and efficient new mining method .
钻孔水力采煤是一种既安全、又能极大地提高资源利用率的新的采矿方法。
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Our ability to predict how soils will behave under new and extreme conditions isn't perfect, especially when those soils are far below the surface, where we can only guess their properties and extents based on a few borehole samples.
我预测土壤在新的极端条件下如何表现的能力并不完美,特别是当这些土壤远低于地表时,我只能根据一些钻孔样本来猜测它的特性和范围。