英语语法分析

Their skulls, pelvises, and hind feet are reptilian.

它们的头骨、骨盆和后脚属于爬行动物。

Adolescent girls are particularly susceptible because their pelvises are not fully developed.

由于她们的骨盆尚未充分发育，青春期女孩特别容易受到影响。

Babies who are too big to come through, and Mothers with flat pelvises that favor a transverse delivery.

胎儿太大不能顺利通过，并且母亲骨盆扁平导致胎位横向。