这个词是什么意思？
Compounds that are used in medicine as sources of radiation for radiotherapy and for diagnostic purposes. They have numerous uses in research and industry. (Martindale, The Extra Pharmacopoeia, 30th ed, p1161)
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D019275 · MeSH 2026。
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