我和你的蔚蓝变成她的大海
[wŏ hé nĭ de yù lán biàn chéng tā de dà hăi]
'Our blue has become her ocean'. The imagery suggests that something originally shared and pure between the writer and an implied 'you' ('蔚蓝' meaning blue, symbolizing purity, clarity, calm) has now become vast and perhaps impersonal ('大海' meaning the ocean, associated with vastness and sometimes impersonality).