留不下来的叫残念留不回去的是眼泪
[liú bù xià lái de jiào cán niàn liú bù huí qù de shì yăn lèi]
This poetic online name has the melancholy meaning of: 'Those who can't stay with you are called unfinished regrets; what cannot be brought back is tears.' It conveys feelings of regret and sorrow after a loss or failure to seize an opportunity or relationship.