n.变速箱，齿轮箱

原形：gearbox复数：gearboxes

The car's engine is connected to the gearbox, which transmits power to the wheels.
这辆车的发动机通过变速器将动力传递给车轮。
She expertly shifted gears in the manual transmission, changing the car's speed accordingly.
她熟练地在手动变速器中换挡，根据需要调整车速。
The gearbox in the racing car needed urgent repair before the next race.
赛车的变速器在下场比赛前急需修理。
The gearbox is an essential component of any mechanical system that requires speed and torque conversion.
变速箱是任何需要速度和扭矩转换的机械设备的关键部件。
After installing the new clutch, the mechanic checked the engagement of the gearbox.
安装新离合器后，技工检查了变速箱的啮合情况。
The noise from the gearbox indicated a problem with the vehicle's transmission system.
变速箱发出的噪音表明车辆传动系统存在问题。
The automatic gearbox allows drivers to focus on the road without manually shifting gears.
自动变速器让驾驶员无需手动换挡，可以专注于驾驶。
The gearbox oil needs to be changed every 50,000 miles to maintain the health of the transmission.
每行驶5万英里就需要更换一次变速器油以保持其良好状态。
In a bicycle, the rear derailleur acts as a type of external gearbox, shifting the chain between different gear ratios.
在自行车上，后飞轮相当于一种外部变速器，负责切换链条到不同的齿轮比。
The company specializes in manufacturing high-quality gearboxes for heavy-duty machinery.
这家公司专精于制造重型机械用的高品质变速器。