nerve of a system of sets

例句：

1. 1. The scientist discovered a new nervein the brain.
   科学家在大脑中发现了一种新的神经。
2. 2. The patient's nerve wasdamaged during surgery.
   病人的神经在手术中受损。
3. 3. The nerve impulse travels throughthe body to signal the brain.
   神经脉冲通过身体传递到大脑以发出信号。