no one on duty的用法和样例：
- A small boat drifted in during the night,with no one on board.
- A small boat drifted in during the night, with no one on board.
- Why does no one on a crowded bus help a woman with a stroller?
- Let no one on the roof of his house go down to take anything out of the house.
- On that occasion there was no one on whom his temper could be worked off.
- Do not carry a purse, nor a bag, nor sandals; and greet no one on the way.