seen service

• v. 具有经验(使用很多而变旧)

seen service的用法和样例：

例句

1. My uncle was a hard-nosed army officer who had seen service in two wars.
   我叔叔是位严格而又倔强的军医，他曾身经两次大战。
2. My two brothers have both seen service.
   我的两个哥哥都服过兵役。