mid plane of pelvis

例句：

1. 1. The mid plane of the pelvis is crucial for maintaining good posture.
   骨盆中平面对于保持良好姿势至关重要。
2. 2.During childbirth, the mid plane of the pelvis shifts to accommodate the baby's head.
   分娩期间，骨盆中平面会发生变化以适应宝宝的头部。
3. 3.A woman's mid plane of the pelvis can be a significant factor in her ability to carry heavy objects.
   女性骨盆中平面是她们能否携带重物的一个重要因素。