sheath of Schwann

例句：

1. 1. The nerve sheath protects the nerve fibers from damage.
   神经鞘保护神经纤维免受损伤。
2. 2.During surgery, the surgeon carefully removes the nerve sheath to avoid damaging the nerve fibers.
   在手术过程中，外科医生小心地去除神经鞘，以避免损伤神经纤维。
3. 3. The nerve sheath is a crucial part of the nervous system that transmits signals between the brain and other parts of the body.
   神经鞘是神经系统中至关重要的部分，它负责在大脑和其他身体部位之间传递信号。