·2,447,543篇论文数据，部分数据来源于NoteExpress
Islands of ciliated epithelial cells were present in the early stage of outgrowth of expiant tissues. Gradually the epithelial cell under-went squamous differentiation.
早期生长晕内可见成群的纤毛细胞，以后逐渐呈现鳞状终未分化。
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