短语讲解：

1. The commander of U.S. troops in Africa, David Rodriguez, told reporters that the military set up two more mobile medical laboratories last week.

set up 建立; 准备
例句：The students also set up debating teams.
学生们还成立了辩论队。

2. The government of Myanmar announced Tuesday that it will free more than 3,000 prisoners.

more than 多于
例句：There is more than a whiff of propaganda. 
所含之宣传实在不止一点点。  
 
3. The release is to take place before the country holds an important international political meeting next month.

take place 发生，举行
例句：Earthquakes take place far underground. 
地震则发生在地球的极深处。