fan lip flap

例句：

1. 1. The fans are blowing the air out of the room.
   风扇正在把房间里的空气吹走。
2. 2. She fanned her face with a handkerchief.
   她用手帕扇着风。
3. 3. The fans were blowing the dust away from the table.
   风扇正在把灰尘从桌子上吹走。