a seatless passenger的用法和样例：
- She had no longer a bed;a rag which she called her coverlet, a mattress on the floor, and a seatless chair still remained.
- Passenger ships are a costly way to travel.
- This is a large passenger airliner.
- A passenger perchance ride on the wagon prevent a fatal accident.
- There is a vein of melancholy in his character.