dimly

adverb
not very brightly or clearly 暗淡地；昏暗地；模糊地
a dimly lit room
灯光昏暗的房间

I was dimly aware (= only just aware) of the sound of a car in the distance.
我隐隐约约听到远处有汽车的声音。

I did remember, but only dimly.
我的确记得，只是记不太清楚了。