保护组织（protective tissue）：为一群外壁或整细胞 壁增厚而具有保护作用的细胞所组成。多分布于植物体的 表层。
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external protective tissue 表面防护薄纸 ; 表面保护用纸
tissue-protective effect 组织保护作用
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It had secondary structure and the secondary protective tissue was periderm.
具有次生结构，次生保护组织为周皮。
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In the UK, the established practice is to operate on the baby almost immediately after birth and place a protective layer of tissue around the spine.
BBC: Surgery hope for unborn babies
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