英语语法分析

OBJECTIVE: to evaluate the hemostatic effect of Reptilase on bleeding after pneumonectomy.

目的：了解立止血在肺切除术后的止血效果。

Objective To study the quality of life(QOL) and influential factors of patients after total pneumonectomy.

目的探讨一侧全肺切除术后病人生命质量（QOL）状况及影响因素。

Mediastinoscopy, however, seems to have a limited role in patient selection for extrapleural pneumonectomy.

而纵隔镜检查对于选择胸膜外全肺切除术的病人仅仅有着有限的作用。