目的了解角膜上皮干细胞的生长特性。

Objective To explore the growth features of corneal epithelial stem cells in vitro.

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结论胎儿角膜上皮干细胞呈现由全层向基底层，再向缘部逐渐迁移的分布规律，且超微结构较幼稚。

Conclusion the migration of corneal epithelial stem cells in the human fetuses was from the whole layers to basal layer and confined to limbus region finally, and their ultrastructure was immature.

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角膜缘干细胞是角膜上皮更新的源泉，维持角膜完整性。

Corneal limbus stem cells are the source of corneal epithelial renewal and they help maintain the integrity of cornea.

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