In a more general way, in a more figurative way, we could say, " to dust someone off" means to help someone back from a difficult situation or from a challenging situation – to help someone recover.

以更一般的方式， 以更具比喻的方式， 我们可以说，“to dust someone off” 的意思是帮助某人从困难的情况或具有挑战性的情况中恢复过来——帮助某人恢复。