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1. Oxford American Dictionary

   dumbbell

   • IPA[ˈdəmˌbel]

   美式

   • n.
     a short bar with a weight at each end, used typically in pairs for exercise or muscle-building.；shaped like a dumbbell

   • noun: dumb-bell, plural noun: dumb-bells

2. • 釋義

   n.

   名詞

   • 1. a short bar with a weight at each end, used typically in pairs for exercise or muscle-building.
   • ▪ shaped like a dumbbell a dumbbell molecule
   • 2. North American informal a stupid person.