Burned-out vehicles or buildings have been so badly damaged by fire that they can no longer be used.
a burned-out car.
一辆烧毁的车。
If someone is burned-out, they exhaust themselves at an early stage in their life or career because they have achieved too much too quickly.
Everyone I know who kept it up at that intensity is burned-out.
我所认识的一直保持那样工作强度的人都早衰了。