“ptarmigan”的概念、定义、翻译、参考文献-科学参考

单词	ptarmigan
释义	ptarmigan [`tar·mǝ·gǝn] ^{VERTEBRATE ZOOLOGY} Any of various birds of the genus Lagopus in the family Tetraonidae; during the winter, plumage is white and hairlike feathers cover the feet.
随便看	foam glass foaminess foaming foaming agent foam-in-place foam-laminated fabric foam line foam mark foam metal foam rubber focal adhesion plaque focal chord focal distance focal infection focal length focal lines focal plane focal-plane shutter focal point focal power focal property focal radius focal ratio focal seizure focal spot

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