你我深谙离开便再也不重来可我们却越行越远不曾告别
[nĭ wŏ shēn ān lí kāi biàn zài yĕ bù zhòng lái kĕ wŏ men què yuè xíng yuè yuăn bù céng gào bié]
Translates roughly to 'We deeply understand once we part there won’t be a second chance, yet we keep walking farther without farewell.' It poetically describes a gradual and mutual estrangement of two people, who knowingly are moving apart without proper closure.