英语语法分析

The directions and degrees of the lumbar isthmic and degenerative spondylolisthesis had statistically evident difference.

椎弓峡部裂性和退变性腰椎滑脱的方向和程度存在差异。

Objective: to study the ct diagnostic value and clinical applications of ct scans parallel to isthmic in isthmic defect of lumbar spine.

目的：探讨平行于椎弓ct扫描对腰椎峡部裂的诊断价值及临床应用。

Isthmic spondylolisthesis does not always cause immediate symptoms of pain. When it does, it usually manifests as a deep ache in the lower back.

峡部裂并不总是立即引起疼痛症状，当有症状时，通常表现为腰部深部疼痛。