再见来不及握手再见来不及回首
[zài jiàn lái bù jí wò shŏu zài jiàn lái bù jí huí shŏu]
'No Time to Shake Hands or Look Back When We Say Goodbye Twice' expresses regret over parting moments, emphasizing speed at which goodbyes happen, leaving no room for formalities or nostalgia.