名词
中文翻译：角壳
同义词：
['horn', 'horny shell', 'horny covering']
例句：
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1.The horn shell is a protective layer on the animal's head.
角壳是动物头上的保护层。
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2. The horn shell was used as a weapon by some ancient civilizations.
角壳在一些古代文明中被用作武器。
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3. The horn shell is made of hardened bone and can be found on many animals.
角壳是由硬化的骨头制成的，可以在许多动物身上找到。