(informal)used as an expression of disbelief in someone's ability to carry out a threat(非正式)[用于表示怀疑对方进行威胁的能力]你行吗？你干得了吗？
柯林斯高阶英汉双解学习词典释义
N-COUNT-COLL
陆军;陆军部队
An army is a large organized group of people who are armed and trained to fight on land in a war. Most armies are organized and controlled by governments.