| 单词 | element 104 |
| 释义 | element 104 [`el·ǝ·mǝnt ´wǝn ´ō `fȯr] CHEMISTRY The first element beyond the actinide series, and the twelfth transuranium element; the longest-lived isotope identified has a half-life of 65 seconds and mass number 261. |
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