箭頭。圖片來源：Hofmann et al., J. Archaeol. Sci., 2023 - 國家地理雜誌中文網 https://www.natgeomedia.com/science/article/content-photo-16527-31564.html?utm_source=natgeomedia&utm_medium=photo&utm_content=Share_16527_31564
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箭頭。圖片來源：Hofmann et al., J. Archaeol. Sci., 2023
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