'peridermis'是英语单词，中文翻译为“表皮层”。它是植物体表最外层的一层细胞，它的主要功能是防止植物体水分蒸发、保护植物体不受外界伤害、以及调节植物体与外界环境的气体交换等。
以下是9个含有“peridermis”的例句：
1. The peridermis protects the plant from water loss and damage by external factors.（表皮层可以保护植物不受水分流失和外界因素的损害。）
2. The peridermis plays an important role in regulating gas exchange and water transport in plants.（表皮层在植物体内的气体交换和水分运输中起着重要的作用。）
3. The formation of the peridermis is closely related to the development and growth of plant roots.（表皮层的形成与植物根系的发育和生长密切相关。）
4. A damaged peridermis can lead to the loss of water and nutrients, which can harm the plant's growth and development.（受损的表皮层会导致水分和营养物质的流失，从而对植物的生长和发育造成伤害。）
5. The periderm of some tree species can protect the plant from fire damage.（某些树种的表皮层可以保护植物免受火灾的伤害。）
6. The peridermis of mosses is relatively simple compared to that of higher plants.（苔藓植物的表皮层相对于高等植物来说比较简单。）
7. The periderm of woody plants is usually composed of several layers of cells, including cork cells and phelloderm cells.（木本植物的表皮层通常由几层细胞组成，包括软木细胞和软皮质细胞。）
8. The periderm can also serve as a natural barrier to prevent the entry of pathogens into the plant.（表皮层还可以作为天然屏障，防止病原体进入植物体内。）
9. The formation of the periderm is a complex process that involves the activation of specific genes and the differentiation of various cell types.（表皮层的形成是一个复杂的过程，涉及到特定基因的激活和多种不同细胞类型的分化。）
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