pelvic index

例句：

1. 1. The doctor used the pelvic index to determine the baby's position.
   医生使用骨盆指数来确定婴儿的位置。
2. 2. The pelvic index is an important factor in determining the success of a surgical procedure.
   骨盆指数是决定手术成功的重要因素。
3. 3. The pelvic index is measured using a special tool called a pelvimeter.
   骨盆指数是通过一种叫做骨盆计的特殊工具测量得出的。