个人意见，仅供参考：
Ultrasound screening of men in this age group can significantly reduce the numbers of men who die from this condition.
通过超声检查这群年龄男性降低这种情况下的死亡具有重要的意义。
对于这一年龄组的男性进行超声筛查能够明显减低其死亡率。
The overall benefits of screening are complex, however, because many men may be subjected to unnecessary anxiety and/or to the complications of surgery.
然而，这项筛查工作的社会整体利益是错综复杂的，因为或许有的人要经受不必要的焦虑和/或者外科手术并发症。
然而，由于很多人可能易受不必要的焦虑和/或术后并发症影响，这项筛查的总体益处尚未明了。
An aneurysm is a localised widening of an artery.
动脉瘤是动脉的局部扩展而成。
动脉瘤是由动脉局部扩张而形成的。
It occurs because the artery wall is weakened and without treatment it could easily burst.
他的发生是因为动脉壁的结构弱化而未予治疗，因而容易突发破裂。
动脉瘤的病因是动脉壁薄弱后，未经治疗而易破裂。
If the aneurysm is in the aorta, the main artery that carries blood through the abdomen, the result often can be fatal.
假如动脉瘤发生在腹部主动动脉，因其是腹部主要的血液通道，其结果常是致命的。
如果动脉瘤发生在腹主动脉，因其是腹部主要的血液通道，其结果常常是致命的。
Doctors believe that any abdominal aortic aneurysm that is greater than 5cm is at a high risk of bursting.
医生认为大于5cm的任何腹主动脉瘤都具有破裂的高风险。
医生认为任何直径大于5cm的腹主动脉瘤发生破裂的风险都很高。
To see whether a program of ultrasound screening could detect these aneurysms before they burst, and save lives as a result, Cochrane Researchers performed a systematic review of screening trials.
看看是否有计划的超声筛查能否在这些动脉瘤破裂之前就把它们检查出来，而挽救患者生命，循证医学科研人员作了一个系统性的回顾性筛查实验。
为了看看超声筛查能否在其破裂之前发现这些动脉瘤，从而挽救生命，Cochrane协作网的研究人员针对超声筛查进行了系统评估。
