Photograph by William Albert Allard, Nat Geo Image Collection - 國家地理雜誌官方網站｜探索自然、科學與文化的最佳權 https://www.natgeomedia.com/science/photo/content-photo-11969-21237.html?utm_source=natgeomedia&utm_medium=photo&utm_content=Share_11969_21237
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Photograph by William Albert Allard, Nat Geo Image Collection
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