形容词
中文翻译：角质的同义词
同义词：
['skin-like', 'horny', 'prickly']
例句：
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1. The skin of the animal is very tough and has a lot of horns.
这个动物的皮肤非常坚韧，有很多刺。
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2. The plant has a hard shell that protects its seeds.
这种植物有坚硬的外壳，保护它的种子。
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3. The old man's hands were covered in calluses from years of hard work.
这位老人的手因多年的辛勤工作而布满了老茧。