translation.en: So right here, these are the motor units that are happening from her spinal cord out to her muscle right here, and as she's doing it, you're seeing the electrical activity that's happening here.
translation.zh: 就在这儿，这些就是 正在起作用的运动单元， 从她的脊椎延伸到这里的肌肉， 伴随着她的动作， 你可以看到这里的电信号活动。