如果黑暗太难熬我陪你日夜颠倒
[rú guŏ hēi àn tài nán áo wŏ péi nĭ rì yè diān dăo]
'If the darkness (sadness/hard times) becomes unbearable, I will stay up through nights with you (to alleviate your troubles).' Offering support when facing hardships: promising company during tough moments, possibly flipping daily routines to ensure presence for comfort or help.