你是如此的难以忘记浮浮沉沉的在我心里
[nĭ shì rú cĭ de nán yĭ wàng jì fú fú chén chén de zài wŏ xīn lĭ]
Means 'You are so hard to forget, floating and sinking in my heart.' It depicts deep-seated, complex emotions about someone special, indicating that despite life’s ups and downs this memory lingers persistently within one's psyche.