你是我毕生的挚爱你是我此生的唯一
[nĭ shì wŏ bì shēng de zhì ài nĭ shì wŏ cĭ shēng de wéi yī]
This reflects ultimate devotion and commitment, professing that the mentioned person is the sole, lifelong passion or soulmate in the speaker's existence, underlining themes of exclusivity and dedication.