noun ダウンロード 🔗共有 ホッキョクグマ A very large bear, Ursus maritimus found in the Arctic Circle, white in appearance and very furry. Examples : "Due to climate change, the habitats of polar bears are rapidly disappearing. " 気候変動により、ホッキョクグマの生息地は急速に消滅しています。 animal nature environment biology geography continent AIとチャット語彙ゲーム読解練習