铅笔画不出你的嘴角橡皮擦不掉你的轮廓
[qiān bĭ huà bù chū nĭ de zuĭ jiăo xiàng pí cā bù diào nĭ de lún kuò]
Using metaphors related to sketching, this line says pencils fail to accurately depict the shape of one’s smile whereas erasers cannot remove traces of someone's facial outline from memory, symbolizing lasting impressions or impact others make on oneself despite efforts to forget.