What do you mean by lingering? How do you understand the meaning of lingering?

1, I can't forget it, it means something happened but there is no way to recover it, but it will always be in my mind and I can't forget it. Generally speaking, it's all in my mind and I can't solve it. That is, whether to come or not, whether to go or not.

2. Biographical history book "Historical Records and Biography of Zheng" by Sima Qian, a historian of the Western Han Dynasty. "There is no more than one official. But when it comes to assisting the young master, he is deeply worried about guarding the city and can't recruit. Even if he doesn't go, he can't take it away. "