回忆像是沙漏流走却不会丢
[huí yì xiàng shì shā lòu liú zŏu què bù huì diū]
The phrase implies that memories are like an hourglass, gradually slipping away with time but still remain somewhere unlost. It expresses the notion that although recollections fade over time, they're precious and not entirely forgotten, emphasizing the lasting impact of memories.