A growth of short, fine hairs underlying the longer and thicker outer hairs of an animal's coat;underfur or underwool.
细动物外浓密的长下生长的短而细的;
A growth of short, fine hairs underlying the longer and thicker outer hairs of an animal's coat;underfur or underwool.
细动物外浓密的长下生长的短而细的;
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