... pennon 细长三角旗 flight feather 飞羽 quill 羽茎 ...
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同义词: pinion quill quill feather
以上来源于: WordNet
N any of the large stiff feathers that cover the wings and tail of a bird and are adapted for flying 飞羽
Only after stage 4 could additional feather variations evolve, including the many specializations we see at stage 5, such as the asymmetrical vane of a flight feather.
一旦演化到阶段4之后,其他各种不同的羽毛才能够演化出来,包括我们在阶段5看到的各种特化羽毛,例如飞羽的不对称羽片。
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