你的爱是我曾吸到肺里的烟
[nĭ de ài shì wŏ céng xī dào fèi lĭ de yān]
Using metaphor, love is compared to smoking; just like inhaling smoke deeply affects the lungs adversely yet temporarily feels good, experiencing deep passionate love may cause pain eventually despite once being enjoyable, signifying both sweetness and bitterness simultaneously.