橡皮擦都擦不了那段记忆
[xiàng pí cā dōu cā bù le nèi duàn jì yì]
An eraser cannot erase those memories. A metaphor suggesting there are experiences so powerful that even attempts to forget them (using an eraser as a tool to remove writing) would prove futile, underscoring the indelibility of certain recollections.