英语语法分析

Objective To evaluate the therapeutic effect of vertebral artery occlusion for the posterior circulation unclipped aneurysms.

目的对椎动脉血管内闭塞治疗后循环不可夹闭动脉瘤疗效进行评价。

Last year we hired a crane to lift some giant unclipped bays over a house because they were physically impossible to move by hand.

去年我们曾雇了一辆起重机，将一些巨大的未经修剪的月桂树吊过房顶，因为它们实在无法用手搬动。

Conclusion The vertebral artery occlusion with balloon or GDCs is an effective and safe method in treating posterior circulation intracranial unclipped aneurysms.

结论血管内椎动脉闭塞治疗后循环不可夹闭动脉瘤是一种有效、安全的治疗方法。