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 gyr·fal·con /ˈʤɝˌfælkən, ˌfɔl ||ˌfɔkən/
 鷹隼之一種

 Gyr·fal·con n.  Zool. One of several species and varieties of large Arctic falcons, esp. Falco rusticolus and the white species Falco Islandicus, both of which are circumpolar.  The black and the gray are varieties of the former.  See Illust. of Accipiter. [Written also gerfalcon, gierfalcon, and jerfalcon.]
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 gyrfalcon
      n : large and rare arctic falcon having white and dark color
          phases [syn: gerfalcon, Falco rusticolus]