| 单词 | atomic number 111 |
| 释义 | atomic number 111 (extremely rare) n WORD FAMILY atomic number 111 n a radioactive transuranic element Syn|Hyper Rg, element 111, roentgenium chemical element, element any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter |
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