The one active mine in the United States, operated by the company Molycorp in Mountain Pass, California, halted production in 1998 after a radioactive-waste spill and was shuttered four years later.

加利福尼亚芒廷山口的一座美国钼业工司的稀土矿因为1998年的一场核废料泄露事故，在2002年就被关闭了。

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Being directed against the demand of the mine guniting robot's design, do the active analysis to the situation of robot's arms end.

针对矿井喷浆机器人设计的要求，对机器人大臂端点位置进行运动分析。

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The snowcapped peaks are Mount Griggs and (far right), part of an active system of ten volcanoes surrounding the valley, a hundred miles south of the proposed Pebble mine.

这两座山是建议开发的卵石矿南面一百英里的山谷周围十个活跃火山系统中的一个部分。

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Silver is actually a by-product of the gold and lead mining, there are few, if any, active mines that mine only silver.

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Huge concrete hangars from the 1920s house an interactive, kid-friendly maritime museum complete with a 1936 mine-laying submarine, a British seaplane that saw active duty in World War I and a large aquarium revealing the fishy inhabitants of the Baltic Sea.

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