最終更新日：2025/11/19
The archaeologists detected minute amounts of cobalt in the ancient pigments, which explained why the frescoes retained their deep blue color.
正解を見る
The archaeologists detected minute amounts of cobalt in the ancient pigments, which explained why the frescoes retained their deep blue color.
音声機能が動作しない場合はこちらをご確認ください
編集履歴（0）
