接近表面，细胞形状变的不规则，愈近表面细胞愈扁平，最表面的呈薄鳞片状。

Toward the surface, the cells become irregular in shape and flatten progressively AS they get closer to the surface, where they are thin and squamous.

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接近表面，细胞形状变的不规则，愈近表面细胞愈扁平，最表面的呈薄鳞片状。

Toward the surface, the cells become irregular in shape and flatten progressively AS they get closer to the surface, where they are thin and squamous.

youdao