be of service

• prep. 有用

be of service的用法和样例：

例句

1. Can I be of service to you in organizing the trip?
   你组织这次旅行需要我帮忙吗？
2. I am happy to be of service.
   我很愿意提供帮助。
3. If I can be of service, do not hesitate to call on me.
   有用得着我的地方，尽管来找我。