what has been seen cannot be unseen

谚语

英文释义

谚语
  1. Repulsive, disturbing, or horrific sights can never be erased from memory once they have been seen.
    — At Dachau he was witness to real rather than abstract suffering; what has been seen cannot be unseen, nor can it be rationalized.

词形变化

that which has been seen cannot be unseen alternative
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