Foramen sciaticum majus

例句：

1. 1. The surgery was performed to relieve the pressure on the nerve.
   手术是为了减轻对神经的压力。
2. 2. The patient's condition improved significantly after the treatment.
   病人在接受治疗后情况明显好转。
3. 3. The foramen sciaticum majus is a rare but important structure in the human body.
   大间隙是人体中一种罕见的但重要的结构。