我不能给你全世界我的世界全部给你
[wŏ bù néng jĭ nĭ quán shì jiè wŏ de shì jiè quán bù jĭ nĭ]
It means 'I cannot give you the whole world, but I will give you all of my world'. It expresses someone's sincere dedication to their loved one with their entire being and what they have.