这个词是什么意思？
An element of the rare earth family of metals. It has the atomic symbol Gd, atomic number 64, and atomic weight 157.25. Its oxide is used in the control rods of some nuclear reactors.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D005682 · MeSH 2026。
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