求翻译：通过改变汽车的传动比，进而使车辆具有不同的动力。一般地，变速器还设有倒挡和空挡，并采用自锁及互锁装置，倒档安全装置，对接合齿采取倒锥齿侧措施，可使操纵可靠，不跳档、乱档、自动脱档和误挂倒档；变速器还应该能进行动力输出。是什么意思？

By changing the transmission ratio of the car, and then the vehicle has a different motivation.

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Through changes automobile the velocity ratio, then enable the vehicles to have the different power.The transmission gearbox also is equipped with the reverse gear and the neutral generally, and uses the self-locking and mutually the lock assembly, the reverse gear safety device, to joins the tooth

By changing the transmission ratio of the car and the vehicle has a different dynamic. In General, the transmission also has a reverse gear and neutral, and the use of the lock and the interlock device, reverse gear safety device, butt-in-tooth bevel gear side measures can be manipulated so that rel

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