lumbar plexus

例句：

1. 1.The lumbar plexus isresponsible for the distribution of pain signals throughoutthe lower body.
   腰椎丛负责在整个下肢传递疼痛信号。
2. 2. During surgery, the surgeon mustcarefully dissect the lumbarplexus to avoid damaging the spinal cord.
   在手术过程中，外科医生必须小心地分离腰椎丛，以避免损伤脊髓。
3. 3. Thelumbar plexus contains sensorynerves that provide sensation in the lowerback and legs.
   腰椎丛包含的感觉神经为下半身提供感觉。