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- Still another system used in underground mining, which is called caving. This involves making the ore cave in on mined chambers or shafts. The ore is then removed by chutes that carry it down to a deeper level, where there is a haulage system. 地下开采使用的另一种采矿法叫作崩落采矿法。这种方法包括使矿石崩落于已采峒室或井筒，然后矿石再通过溜井放到下面水平的运输巷道。
- top slicing combined with ore caving 下向水平分层崩落采矿法
- The ore is smelted in this large factory. 这个大型工厂里熔炼矿石。
- Huge Ore Caving Technology with Spherical Explosive Cartridges and Cluster Drilling Holes 束状孔等效直径当量球形药包大量落矿采矿技术
- First, ore is mixed with coke and limestone. 先把铁矿石和焦碳、石灰石混合在一起。
- A hermit used to live in the cave. 一位隐士曾经住在那个山洞里。
- We kindled a firebrand in the cave. 我们在山洞里点燃火把。
- We will make an assay of the ore that he brought. 我们将对他带来的矿石做实验鉴定。
- A mouse ran out from the dark orifice of the cave. 一只老鼠从黑暗的洞口跑出。
- Seen from within, the cave looked larger. 从内部看，那个地洞显得更大。
- A bin for storing ore, grain, or other materials. 仓库储放矿石、谷物或其它材料的大箱
- There are pockets of ore in the mountain. 那座山里有好几块矿藏。
- The dark, dank cave gave me the willies. 这阴暗潮湿的山洞使我感到心惊肉跳。
- There are streaks of ore in the mountains. 这山里有矿脉。
- Iron ore has been discovered in the area. 这地区发现了铁矿。
- There is a bear in the inmost recesses of the cave. 洞穴的最深处有只狗熊。
- Where's the entrance to the cave? 这个洞穴的入口在哪里?
- A rich mine, vein, or pocket of ore. 富矿脉富矿坑、脉、囊
- A massive boulder blocked the entrance of the cave. 一块巨大的圆石堵住了山洞的入口。
- They went to the cave in quest of hidden treasure. 他们到山洞去寻找宝藏。
