这个词是什么意思？
Electropositive chemical elements characterized by ductility, malleability, luster, and conductance of heat and electricity. They can replace the hydrogen of an acid and form bases with hydroxyl radicals. (Grant & Hackh's Chemical Dictionary, 5th ed)
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D008670 · MeSH 2026。
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