And then starting to turn the crank on the algebra.
然后开始代数变换。
2
The fifth is starting system and its purpose is to change the electrical current into the mechanical energy to push the crank-shaft around. By means of this, the engine can be started.
发动机的第五系统是启动系统，其目的是将电流转化成机械能来推动曲轴旋转，通过这一点，发动机可以启动。
3
Without them our mobile devices would be a lot less mobile and we might still be crankstarting our cars.