名词
中文翻译：外层膜
同义词：
['periphery', 'outer layer', "external layer例句：1. The plant's trama peridium is made up of tough", 'waxy material that protects the plant from the elements.（这种植物的外层膜由坚硬的蜡质物质组成，可以保护植物免受外界环境的影响。）']
例句：
-
1. The plant's trama peridium is made up of tough, waxy material that protects the plant from the elements.
这种植物的外层膜由坚硬的蜡质物质组成，可以保护植物免受外界环境的影响。
-
2. The scientist observed the structure of the trama peridium and determined its role in the plant's defense mechanisms.
这位科学家观察了这种外层膜的结构，并确定了它在植物防御机制中的作用。
-
3. The trama peridium plays a crucial role in the plant's ability to resist pathogens and pests.
这种外层膜在植物抵抗病原体和害虫方面起着至关重要的作用。