你是我致命的唯一
[nĭ shì wŏ zhì mìng de wéi yī]
'You Are My Lethally Unique One' conveys a sense of exclusivity and depth in a romantic or personal connection. It suggests an irreplaceable relationship where this particular individual is viewed as indispensable, almost defining or controlling all aspects of the speaker's life, with their existence being crucial and unique above all others.