mark idle

例句：

1. 1. The workers marked the area as idle before they left for the day.
   工人们在离开前将该区域标记为空闲。
2. 2. The car was parked idle while we waited for the bus.
   汽车停在我们等公交车时是空闲的。
3. 3.The house is idle now, but it will be occupied soon.
   现在这房子是空闲的，但很快就会有人入住。