on duty
US /ˈɑn ˈduː.ti/
UK /ˈɑn ˈduː.ti/
短語
1.
值班, 在崗
working, especially when one is a police officer, a soldier, or a medical worker
範例:
•
The police officer was on duty for twelve hours.
這名警察值班了十二個小時。
•
Nurses are always on duty, even on holidays.
護士們總是值班，即使在節假日也是如此。
在 Lingoland 學習這個單詞