放不下的是曾经丢不掉的是回忆
[fàng bù xià de shì céng jīng diū bù diào de shì huí yì]
'放不下的是曾经丢不掉的是回忆' (fang bu xia de shi cong qian diu bu diao de shi hui yi) signifies what can't be put down are the past times, what can never be lost are the memories. This showcases nostalgia and reluctance to move on from the past, emphasizing the lasting impact and significance of certain events or periods that one has experienced, especially those imbued with emotional meaning.