最終更新日：2025/11/30
During the spring survey, we found a thick layer of perilithon covering the submerged cobbles, indicating high nutrient levels.
正解を見る
During the spring survey, we found a thick layer of perilithon covering the submerged cobbles, indicating high nutrient levels.
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）
