If you are unfit, your body is not in good condition because you have not been getting regular exercise.
Many children are so unfit they are unable to do even basic exercises.
许多孩子身体很弱,他们甚至不能做基本的运动。
If someone is unfit for something, he or she is unable to do it because of injury or illness.
He had a third examination and was declared unfit for duty.
他做了第三次检查,被告知不适合上班。
If you say that someone or something is unfit for a particular purpose or job, you are criticizing them because they are not good enough for that purpose or job.
Existing houses are becoming totally unfit for human habitation.
现存的房子正变得完全不适合人居住。
They were utterly unfit to govern.
他们完全不胜任管理工作。