| 单词 | coltan |
| 释义 | coltan (once / 288276 pages) n WORD FAMILY coltan USAGE EXAMPLESThere's copper, diamonds, gold, uranium and coltan, used in every mobile phone in the world. BBC(Apr 15, 2016) More recently, Ugandan and Rwandan militias killed thousands to plunder coltan and gold. New York Times(Nov 15, 2014) The forests where they live are being rapidly cleared for timber, farming, and mining, particularly for coltan, an ore used in cellphones and other electronics. New York Times(Sep 29, 2014) n a valuable black mineral combining niobite and tantalite; used in cell phones and computer chips Syn|Hyper columbite-tantalite mineral solid homogeneous inorganic substances occurring in nature having a definite chemical composition |
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