I had a dim recollection of having met her before. 我隐约记得以前好像见过她。
She had a dim recollection of a tall, bald man who used to visit her parents.
I have a dim memory of the events of that evening but, twenty years after it all happened, it's rather vague.
It was such a long time ago that it's just a dim memory at this point.
He had a dim recollection of a visit to such a house.
See also: dim adjective (NOT CLEAR)