VOA慢速英语:Explosions Change Soldiers’ Brains, Study Says

短语讲解：

1. It may be difficult for the former soldiers to concentrate on what they are doing.

concentrate on 专心于，把思想集中于; 将…集中于…
例句：He wanted to concentrate on a single issue.
他要集中在单一的问题上。

2. The professor says that, as a result of the study’s findings, doctors may decide to give different medicines to veterans suffering from post-traumatic stress disorder.

as a result of 因; 由于…的结果; 起因
例句：Many facts emerged as a result of the investigation.
调查结果,许多事实暴露出来。