1. The epicuticle acts as a protective layer for the insect's exoskeleton.
超上皮层充当昆虫外骨骼的保护层。

2. The epicuticle of some plant leaves helps reduce water loss by forming a waxy coating.
一些植物叶片的上皮层通过形成蜡质涂层有助于减少水分损失。