我会相信你是我的全部我会相信你是我的一切
[wŏ huì xiāng xìn nĭ shì wŏ de quán bù wŏ huì xiāng xìn nĭ shì wŏ de yī qiè]
It implies a deep sense of trust and reliance on someone, expressing that the person is everything in the speaker's world. Roughly translates to 'I believe you are my all'.