英语语法分析

Objective: To evaluate the significance of the antibody to group A streptococcal polysaccharide(ASP) in the diagnosis of rheumatic valvulitis.

目的：探讨抗A组溶血性链球菌壁多糖抗体（ASP）在风湿性心瓣膜炎中的意义及诊断价值。