英语语法分析

Objective:To study the CT and MRI diagnosis of retroperitoneal liposarcoma.

目的：研究腹膜后脂肪肉瘤的CT、MRI诊断。

Objective to study the recurrent mechanism and prognosis of primary retroperitoneal liposarcoma.

目的探讨原发性腹膜后脂肪肉瘤复发的机理及预后。

Purpose To understand the clinical and pathologic characteristics of primary liposarcoma of the orbit.

目的：了解眼眶内原发性脂肪肉瘤的临床及病理特点。