多么痛的领悟你曾是我全部
[duō me tòng de lĭng wù nĭ céng shì wŏ quán bù]
'How Painfully I Realized That You Were Once Everything to Me.' This title reveals a poignant memory and a deep heartbreak as the person realizes that someone once was their whole world but now isn't. It reflects both profound loss and nostalgia.