unmyelinated nerve fiber

例句：

1. 1. The unmyelinated nerve fibers in the skin are responsible for sensation.
   皮肤中的无髓神经纤维负责感觉。
2. 2.The researchers found that the unmyelinated axons were more sensitive to temperature changes.
   研究人员发现，无髓轴突对温度变化更敏感。
3. 3. The unmyelinated fibers in the peripheral nervous system are crucial for transmitting signals.
   周围神经系统中的无髓纤维对于传递信号至关重要。