名词
中文翻译：保护性外壳
同义词：
['protective shell', 'protective barrier']
例句：
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1.The turtle's propodosomatal shield is a crucial defense against predators.
乌龟的护甲是抵御捕食者的重要防御。
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2. The researcher found that the propodosomatal shield could be used to protect the plant from herbivores.
研究者发现，这种护甲可以用来保护植物免受食草动物的侵害。
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3. The propodosomatal shield of the bird is designed to protect its vulnerable young from predators.
鸟的护甲设计用来保护其脆弱的幼鸟免受捕食者的侵害。