Observerare

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  Rachelle Goldfinch

  https://inventmag.com/%ed%85%8c%eb%93%9c%eb%b2%b3%ec%b9%b4%ec%a7%80%eb%85%b8-%ed%98%81%ec%8b%a0%ec%9d%98-%ec%a4%91%ec%8b%ac%ec%97%90-%ec%84%9c%eb%8b%a4/