英语语法分析

The objective is to explore the pathogenic course, clinical features and prognosis on hallervorden spatz disease (HSD).

目的是探讨苍白球黑质红核色素变性（HSD）的发病过程、临床特征及预后诊断。

Objective To explore the pathogenic course, clinical features and prognosis on hallervorden spatz disease(HSD).

目的探讨苍白球黑质红核色素变性（HSD）的发病经过、临床特征及预后。