甲上皮和表皮形成一个防护密封。

The eponychium and the cuticle form a protective seal.

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位于隐形眼镜和角膜之间的那层泪膜液体会轻轻移动着这些上皮细胞，暂时形成一个新的眼部结构。

These cells are gently shifted by the fluid - the tear film - between contact lens and cornea, temporarily creating a new structure to the eye.

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同时，舌上皮细胞角化障碍及舌上皮细胞凋亡亦可能促进花剥苔的形成。

The disability of keratinization and apoptosis of epithelial cells of tongue may also be one cause for its formation.

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This tube, this hollow tube, which food passes through is made up of many, many epithelial cells which directly abut one another and would be a flat sheet except that it's rolled up into a tube.

这个管道,这个中空的管道,食物可以穿行其中,而它就是由许多许多上皮细胞构成的,上皮细胞一个连着一个,形成了一个平坦的细胞层,但实际上它们还在肠管中卷成管状

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