单词 | 小翼羽 |
释义 | 〔alula〕A small joint in the middle of a bird's wing, homologous with the thumb and bearing three or four quill-like feathers. Also called bastard wing ,spurious wing 小翼羽:鸟翅中部的小骨节,与大拇指同源,上有三四片羽毛 也作 bastard wing,spurious wing |
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