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。
Islands of ciliated epithelial cells were present in the early stage of outgrowth of expiant tissues. Gradually the epithelial cell under-went squamous differentiation.
B组，2-3天大部分组织块边缘有细胞移行向外长出生长晕，细胞呈多角形、圆形，细胞之间相互连接。
The cells of B group crawled outward from the tissue inoculation in 2-3 days and the cells were polygen or rotundity and contacted each other.
B组，2-3天大部分组织块边缘有细胞移行向外长出生长晕，细胞呈多角形、圆形，细胞之间相互连接。
The cells of B group crawled outward from the tissue inoculation in 2-3 days and the cells were polygen or rotundity and contacted each other.
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