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单词
keratin
释义
Word Frequency
keratin
(
ˈkɛrətɪn
)
or
ceratin
noun
a fibrous protein that occurs in the outer layer of the skin and in hair, nails, feathers, hooves, etc
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milch cow
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mild-mannered
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mileage allowance
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更新时间:2025/7/26 4:25:10