前端，又细又长的神经元伸展的细胞突出停止，然后拖动后边的球状细胞，然后再次伸展，如此反复。
In front, the long thin cellular protrusion of the neuron extends, pauses, then drags the bulbous cell body behind it, then extends again, and so on.
电控部分：是控制拖动动平衡机电机的启动和停止及调速的部件，也叫电控箱。
The control part is: control drag balancing machine motor start and stop and speed components, also called electric control box.
拖动是慢些和精确些的，并且在手指拿起时屏幕停止了相应。
Drags are slower and more precise, and the screen stops responding when the finger is picked up.
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