名词
中文翻译：外皮
同义词：
['exodermis', 'cuticle']
例句：
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1.The epithecium of the leaf is made up of cells that protect the underlying tissue.
叶子的外皮由细胞组成，保护下面的组织。
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2. The epithecium is responsible for protecting the plant from environmental stresses.
外皮负责保护植物免受环境压力。
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3. Researchers are studying the role of the epithecium in plant defense mechanisms.
研究人员正在研究外皮在植物防御机制中的作用。