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秃鹳的绒羽，用于清理衣服。
Downy feathers of marabou storks used for trimming garments.
youdao
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单一支羽毛也可以由顶端为正羽、基部为绒羽组合而成。
Feathers can have a pennaceous vane and a plumulaceous base.
youdao
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单一支羽毛也可以由顶端为正羽、基部为绒羽组合而成。
Feathers can have a pennaceous vane and a plumulaceous base.
youdao