这个词是什么意思？
The innermost layer of the three meninges covering the brain and spinal cord. It is the fine vascular membrane that lies under the ARACHNOID and the DURA MATER.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D010841 · MeSH 2026。
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