| 单词 | rare-earth element |
| 释义 | rare-earth element (râr′ûrth) n. Any of a group of 17 naturally occurring metallic elements that have similar properties, consisting of scandium, yttrium, and the 15 elements with atomic numbers 57 through 71 (the lanthanides). The rare-earth elements are widely used in electronics and other high-tech products. [RARE EARTH.] |
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