这个词是什么意思？
The activated center of a lymphoid follicle in secondary lymphoid tissue where B-LYMPHOCYTES are stimulated by antigens and helper T cells (T-LYMPHOCYTES, HELPER-INDUCER) are stimulated to generate memory cells.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D018858 · MeSH 2026。
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