这个词是什么意思？
A technique for measuring extracellular concentrations of substances in tissues, usually in vivo, by means of a small probe equipped with a semipermeable membrane. Substances may also be introduced into the extracellular space through the membrane.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D017551 · MeSH 2026。
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