| 单词 | rare-earth element |
| 释义 | rare-earth element [`rer ´ǝrth `el·ǝ·mǝnt] CHEMISTRY The name given to any of the group of chemical elements with atomic numbers 58 to 71; the name is a misnomer since they are neither rare nor earths; examples are cerium, erbium, and gadolinium. |
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