短语词组短语flat oval pelvis 扁卵圆骨盆simple flat pelvis 单纯扁平骨盆;扁平骨盆;单纯性扁骨盆英语flat pelvis flattened pelvis 扁平骨盆Rachitic flat pelvis 佝偻病性扁平骨盆 返回 flat pelvis