change gearbox的用法和樣例：
例句
- Unlike a conventional turbofan, it uses a gearbox rather than a shaft between the fan and the turbine.
與傳統的渦扇發動機不同，它使用齒輪箱將風扇以及渦輪連接起來，而不是一根軸。 - The proposed UWT effectively extracted the friction fault features of amplitude modulation and transient impact from vibration signal of a gearbox.
採用這種非抽樣小波變換從齒輪箱的振動信號中有效提取幅值調製和瞬態衝擊的摩擦故障特徵。
