英语语法分析

The brain lies underneath the sinciput; the occiput is hollow.

脑位于前顶下面；枕骨是空的。

Distance from occiput to stop equal to distance from stop to tip of nose.

从后脑到止部的距离等于从止部到鼻尖的距离。

In other words, the fetal occiput is directed towards the mother's left, anterior side.

换言之就是胎儿枕骨位于母亲骨盆左前侧。