这个词是什么意思？
Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D012822 · MeSH 2026。
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