名词
中文翻译：外层
同义词：
['periphyton', 'periderm', 'peridermis']
例句：
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1.The plant's perimyium is a crucial component of its defense mechanisms.
植物的外层是其防御机制的重要组成部分。
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2.The researcher found that the perimyium plays a significant role in the plant's growth and development.
研究者发现，外层在植物的生长和发育中起着重要的作用。
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3.The perimyium is made up of cells that are specialized for protecting the plant from environmental stresses.
外层由专门用于保护植物免受环境压力的细胞组成。