英语语法分析

Traumatic dislocation of the metacarpophalangeal joint is a relatively uncommon injury.

外伤性脱位的掌指关节是一种相对少见的损伤。

Objective: To study the result of operation of metacarpophalangeal joints contracture in old people's.

目的：探讨老年人掌指关节挛缩的手术效果。

Elbow flexion, wrist flexion and extension, and metacarpophalangeal joint flexion and extension were not impaired.

但是肘关节屈曲、腕关节的屈曲和伸展、掌指关节的屈曲和伸展未受影响。