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1. Oxford Dictionary

   gearbox

   • IPA[ˈɡɪəbɒks]

   英式

   • n.
     a set of gears with its casing, especially in a motor vehicle; the transmission

   • noun: gearbox, plural noun: gearboxes

2. • 釋義

   n.

   名詞

   • 1. a set of gears with its casing, especially in a motor vehicle; the transmission a four-speed gearbox