求高手翻译下面一句话，在线等！！！

in the aspect of gear box development, in order to improve the flexbility of driving operation, reduce the fatigue of driver and improve the power and economy of the car, people make a great effort in changing the structure and gear shift.

In the transmission gearbox development aspect, for the enhancement driving operation's portability, reduces pilot's weary degree, enhances automobile's power and the efficiency, the people in changed transmission gearbox's structure and shift gears in the method to make the very great effort