英语语法分析

Objective To explore the biological therapy of human laryngocarcinoma.

目的探索喉癌生物治疗新方法。

Objective To discuss the causes of pharyngeal fistula after laryngocarcinoma operation.

目的探讨喉癌术后咽瘘发生的原因。

Objective: to evaluate the effect of vertical partial laryngectomy in the treatment of laryngocarcinoma.

目的：评价垂直部分喉切除术治疗喉癌的效果。