这个词是什么意思？
The portion of the GASTROINTESTINAL TRACT between the PYLORUS of the STOMACH and the ILEOCECAL VALVE of the LARGE INTESTINE. It is divisible into three portions: the DUODENUM, the JEJUNUM, and the ILEUM.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D007421 · MeSH 2026。
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