In a vehicle with manual transmission, downshift as you reduce speed.
手动档车辆，在减速时应相应换档至合理档位。
In a vehicle with manual transmission, you may downshift into a lower gear as you slow down.
手动档车辆，降低车速的同时，换低至合适档位。
The system in the invention can improve transmission braking in generator braking gearbox downshift by utilizing electric converting device to regenerate braking ability.
本发明的系统可以通过利用电能转化装置再生制动能力，在发动机制动变速器降挡事件中提供平滑的传动系制动。
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