这个词是什么意思？
The space between the arachnoid membrane and PIA MATER, filled with CEREBROSPINAL FLUID. It contains large blood vessels that supply the BRAIN and SPINAL CORD.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D013346 · MeSH 2026。
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