我爱你深入骨髓我爱你直通心脏
[wŏ ài nĭ shēn rù gú suĭ wŏ ài nĭ zhí tōng xīn zàng]
These words express passionate love. 'Deep to the bone marrow' represents the feeling of falling so deeply in love that it seems as if love permeates even the bone marrow; 'straight to the heart' means the loved one is at the core of one's heart.