| 单词 | rare-earth element |
| 释义 | rare-earth element (once / 2954828 pages) n WORD FAMILY rare-earth element USAGE EXAMPLESThis ring is packed with 648 22cm-long neodymium magnets laced with another rare-earth element, dysprosium, which makes them much less liable to become demagnetised. BBC(Mar 23, 2014) Peter A. Morrison, manager of the Navy program, said the weapon’s lasers use a crystal that has been doped with a rare-earth element. New York Times(May 14, 2013) Iridium was the key, rare-earth element that tipped geologists off that an asteroid struck the Earth at the end of the Cretaceous. Slate(Feb 07, 2013) n any element of the lanthanide series (atomic numbers 57 through 71) Syn|Hypo|Hyper lanthanide, lanthanoid, lanthanon, rare earth terbium metal a separate group of related lanthanides, including terbium, europium, gadolinium, and sometimes dysprosium group, grouping any number of entities (members) considered as a unit |
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