be of service

基本解释

But I found the elevator was out of service due to a blackout.
但是我发现电梯由于断电不能工作。
There was still another chair in the detached alcove, but the straw was half gone from it, and it had but three legs, so that it was of service only when propped against the wall.
在那小暖房里，的确还有一张椅子，但是椅上的麦秸已经脱了一半，并且只有三只脚，只是靠在墙上才能用。
Twitter, the popular microblogging site, was out of service much of the day Thursday as it worked to defend itself against a Web attack, but service appeared to have been restored by late evening.
这个广受欢迎的微博客网站，在星期四的大部分时间里停止服务，它其实是在抵御一场网络攻击，但当天晚间服务得到了恢复。

Kathleen Foley was named to head Sloan Kettering's new Pain Service within the Department of Neurology in nineteen eighty-one.
Peter, as Lindsey Hughes has argued, was highly suspicious of any alternative to state service, especially the monastic way of life, which I've already said.
正如林赛·休斯所说的那样,彼得对任何以其他方式服务国家的行为,都持怀疑态度,尤其是僧侣生活,这我在前面已经提到过了
耶鲁公开课 - 欧洲文明课程节选
I was present at the memorial service for a friend of mine who was died.
当时我出席,一位我过世的朋友的葬礼。
麻省理工公开课 - 电影哲学课程节选

If they had asked my opinion, I would have suggested they wait to fumigate the plane until it was out of service for the day.
FORBES: The Death of Common Sense