| 单词 | wolframite |
| 例句 | The Democratic Republic of the Congo has abundant reserves of diamonds, gold, coltan, copper, tantalite, wolframite, manganese and uranium. Congo's Blood Diamond Trade Takes Hit From Dodd-Frank Wall Street Reform Law 2014-06-13T04:00:00Z Add on conflict minerals such as cassiterite, gold, wolframite, cobalt and coltan from the Congo, plus the damage from huge pits and deep tunnels. Is there an ethical laptop? 2012-10-06T23:05:26Z Conflict minerals include coltan, cassiterite, gold and wolframite, and while you may not be familiar with some of these, they are widely used in electronics. Deal Professor: Humanitarian Effort in Congo Puts Wall St. Regulator in Unintended Role 2012-08-28T21:13:30Z The minerals are gold, cassiterite, wolframite and columbite-tantalite, also called coltan. S.E.C. Votes to Require More Disclosure on Source of Minerals 2012-08-22T16:53:07Z How the SEC is monitoring electronics companies use of cassiterite, columbite-tantalite and wolframite. Disruptions: Wearing Your Computer on Your Sleeve 2011-12-19T03:13:41Z The minerals in question—cassiterite, columbite-tantalite, gold and wolframite—are widely used in consumer electronics and other products, although Congo supplies no more than 20% of global demand for these raw materials. Can Annual Reports Save Lives? 2011-12-16T23:14:58Z Cassiterite, wolframite, coltan: they might be the spoiled offspring of celebrity parents, or characters from an unfamiliar fairytale. Congo rapes: Scramble for Africa 2010-08-27T23:01:00Z Columbite-tantalite, cassiterite, wolframite, gold and metals derived from them are widely used in the manufacture of cellphones, laptop computers, MP3 players, digital cameras and all sorts of other consumer electronics. Minerals Provision Becomes Part of Financial Bill 2010-05-22T00:41:00Z Important mines of gold and silver, considerable deposits of wolframite, valuable ores of molybdenum and vanadium, and quarries of onyx marble, are also worked. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 5 "Arculf" to "Armour, Philip" Tungsten is found in wolframite in Boulder county. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" It’s found in wolframite, and hubnerite and so on; but this is calcium tungstate, where it is found in connection with lime. Shadow Mountain |
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