angle of subpubic arch

例句：

1. 1.The doctor measured the angle of the subpubic arch to determine the cause of the patient's pain.
   医生测量耻骨弓的角度来确定病人疼痛的原因。
2. 2. During childbirth, the angle of the subpubic arch changes due to the pressure on the pelvic floor muscles.
   分娩期间，耻骨弓的角度会因为对盆底肌肉的压力而发生变化。
3. 3. The angle of the subpubic arch is important for assessing the position and alignment of the femurin relation to the pelvis.
   耻骨弓的角度对于评估股骨相对于骨盆的位置和对齐情况非常重要。