时光是记忆专属橡皮擦
[shí guāng shì jì yì zhuān shŭ xiàng pí cā]
The phrase combines time (时光 shiguang), memory(记忆 jiyi), special(special), and eraser (橡皮擦 xiangpicao). Together it conveys the sense that as we journey through life over Time our Memories are specially erased like using an eraser on a page.