| 单词 | niobium |
| 释义 | niobium (once / 119387 pages) n WORD FAMILY niobium USAGE EXAMPLESIn April, it agreed to sell its Brazilian niobium and phosphates businesses to China Molybdenum for $1.5 billion. Wall Street Journal(Dec 22, 2016) NioCorp’s primary target is niobium, which is used to harden steel. Washington Times(Oct 22, 2016) Are there planets where the inhabitants proudly display pendants of niobium and bracelets of protactinium, while gold is a laboratory curiosity? Carl Sagan, Cosmos(1980) n a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium Syn|Hypo|Hyper Nb, atomic number 41 columbium a former name for niobium metal, metallic element any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
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