army可数还是不可数

　　He gets out of the army in a few weeks.

　　几周之后他就要离开部队。

　　The whole territory is now controlled by the army.

　　现在全境都在军队的控制之下。

　　The book goes on to describe his experiences in the army.

　　本书继而描述了他在部队的经历。

　　The army began their long march to the coast.

　　部队开始了他们开往沿海地区的长途行军。