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1. Oxford American Dictionary

   barn door

   • IPA[ˈbärn ˌdôr]

   • n.
     the large door of a barn.；used to refer to a large and easy target

   • noun: barn door, plural noun: barn doors

2. • 釋義

   n.

   名詞

   • 1. the large door of a barn.
   • ▪ used to refer to a large and easy target on the shooting range he could not hit a barn door
   • 2. a hinged metal flap fitted to a spotlight to control the direction and intensity of its beam.