感情的孽种叫回忆时间的北鼻叫青春
[găn qíng de niè zhŏng jiào huí yì shí jiān de bĕi bí jiào qīng chūn]
The phrase suggests “The offsprings of relationships are called memories; the child of time is called youth.” A romantic yet melancholic way to describe memories and youth, reflecting the bittersweet nature of love and time passing.