英语语法分析

Spinal epidural abscesses may be located anteriorly or posteriorly within the spinal canal.

脊髓硬膜外脓肿可以位于椎管前部或后部。

The posterior ethmoid cells are easily identified as they are larger, wider, and fewer in number than anteriorly.

后组筛窦的气房一般大而宽，在数量上也少于前组筛窦，容易确定。

Grade discs at all levels moved posteriorly in flexion and anteriorly in extension when compared to neutral posture.

在所有水平的I级椎间盘，与中立位相比，在屈曲位向后、伸展位向前膨出。