再怎么回忆那月亮也缺了再怎么纪念那星星也暗了
[zài zĕn me huí yì nèi yuè liàng yĕ quē le zài zĕn me jì niàn nèi xīng xīng yĕ àn le]
This poetic expression suggests that even revisiting memories (the moon) cannot bring full satisfaction or completion (fullness), and commemorations (bright stars) cannot light up the dark anymore - it conveys feelings about how nothing stays unchanged no matter how much one tries to hold on to past memories.