你眼睛会笑但却不是因为我
[nĭ yăn jīng huì xiào dàn què bù shì yīn wéi wŏ]
Your Eyes Smile but Not Because of Me points towards a poignant situation where someone recognizes happiness in another's eyes but laments that their joy isn't because of the observer's efforts. There's a mixture of appreciation and pain in seeing the subject’s laughter, knowing their mirth comes from elsewhere.