柯林斯詞典gearbox /?ɡ???b?ks/ (gearboxes) 1. N-COUNT A gearbox is the system of gears in an engine or vehicle. 齒輪箱 返回 gearbox劍橋詞典a metal box containing the gears in a vehicle 齒輪箱,變速箱 返回 gearbox