若即若离是你的背影若即若离是你的微笑
[ruò jí ruò lí shì nĭ de bèi yĭng ruò jí ruò lí shì nĭ de wēi xiào]
This portrays the ambivalence and ambiguity present in interactions, especially romantic ones. The presence but distance felt from someone's back view and smile suggest a teasing yet elusive quality.