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1. Oxford Dictionary

   gearwheel

   • IPA[ˈɡɪəwiːl]

   英式

   • n.
     a toothed wheel in a set of gears.；(on a bicycle) a cogwheel driven directly by the chain.

   • noun: gearwheel, plural noun: gearwheels

2. • 更多解釋

   gearwheel

   • IPA[ˈɡirˌ(h)wēl]

   美式

   • n.
     a toothed wheel in a set of gears.

   Oxford American Dictionary