瞳瞳眼眸一丝忧伤
[tóng tóng yăn móu yī sī yōu shāng]
It paints a poetic image: 'In clear eyes (瞳瞳 here implies bright/clear eyes), a hint of sadness lingers.' It reflects a person who hides inner sorrows behind their bright or piercing gaze, possibly masking true emotions beneath a composed appearance.