epithelial transplantation

例句：

1. 1. The epithelial cells are responsible for the body's defense against foreign invaders.
   上皮细胞负责身体对外来入侵者的防御。
2. 2. The epithelial layer is where the skin meets the underlying connective tissue.
   上皮层是皮肤与下面的结缔组织接触的地方。
3. 3. Epithelial growth can be controlled by drugs that target specific proteins.
   通过针对特定蛋白质的药物可以控制上皮生长。