这个词是什么意思？
A man-made radioactive actinide with atomic symbol Cf, atomic number 98, and atomic weight 251. Its valence can be +2 or +3. Californium has medical use as a radiation source for radiotherapy.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D002142 · MeSH 2026。
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