Old memories constantly recurred to him.是什么意思？

Old memories constantly recurred to him.

往事经常浮现在他的脑海里.

old

adj. 老的，古老的，以前的，（用于指称被替代的东西）原来的；n. 古时；

例句
She was old enough to absent herself from the lunch table if she chose...
她长大了，可以自己做主不来吃午餐了。

memories

n. 记忆力( memory的名词复数 )，记忆中的事物，记忆系统，记忆容量；

例句
...bittersweet memories of his first appearance for the team.
他首次代表球队登场亮相时苦乐参半的记忆

constantly

adv. 不断地，时常地，始终，一直；

例句
Her dedication constantly astonishes me.
她的奉献精神总是让我震惊。

recurred

v. 再发生，复发( recur的过去式和过去分词 )，治愈；

例句
The checkered pattern of that suspender recurred incessantly to his mind.
那根背带的棋盘格花纹不停地在他脑子里显现出来.

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

him

pron. (he的宾格)他；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。