be of service (to somebody)成語所屬單字servicebe of service (to somebody)be of service (to somebody) — 慣用語慣用語1. To be helpful or useful to someone.1.慣用語釋義對某人有用；幫得上忙To be helpful or useful to someone.例句Can I be of service to you today?The librarian was happy to be of service to the students.