形容词
中文翻译：Unknown
同义词：
['hardened', 'callous', 'rough', 'tough', 'leathery']
例句：
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1. The old man's hands were calloused from years of farming.
这位老人的手因多年务农而变得粗糙。
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2. The dog had a calloused pad on its foot.
这只狗的脚上有一个厚厚的垫子。
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3. The farmer's hands were calloused from working in the fields all day.
这位农民整天在田里工作，手上起了硬皮。