昨天今天过去不再回来情人离去永远不再回来
[zuó tiān jīn tiān guò qù bù zài huí lái qíng rén lí qù yŏng yuăn bù zài huí lái]
Yesterday and today passed won't come back again, lover gone never returns forever. The meaning conveys a sense of sadness about losing something important, probably implying memories and experiences that can never go back, also indicating some sort of loss in relationships.