你会游泳又怎会溺死我心海
[nĭ huì yóu yŏng yòu zĕn huì nì sĭ wŏ xīn hăi]
Translating closely: If you can swim, how could you drown in my sea of heart. This romanticizes love by metaphorically saying one’s love interest cannot leave them because they are already part of their ‘sea’. Reflects hope and possessiveness in love.