名词
中文翻译：外层
同义词：
['outermost', 'outer layer']
例句：
-
1.The pericamium of the onion is a thin, translucent layer that protects the bulb.
洋葱的外皮是一层薄而透明的保护层，保护着球茎。
-
2. The pericamium of the plant is where new growth will emerge from the stem.
植物的外层是新生长从茎部冒出的地方。
-
3. The pericamium is where the plant's defenses are strongest, providing protection against pests and disease.
外层是最坚固的保护层，可以抵御害虫和疾病的侵害。