曾经少年薄荷凉堇色流年不复君
[céng jīng shăo nián bó hé liáng jĭn sè liú nián bù fù jūn]
'I was once young, with refreshing minty breath; you and I went our separate ways amidst the fleeting, lavender-hued years,' which poetically describes nostalgia and a longing for past youthful days that have now passed, especially in relationships.