noun ダウンロード 🔗共有 セイウチ A large Arctic marine mammal related to seals and having long tusks, tough, wrinkled skin, and four flippers, Odobenus rosmarus. Examples : "The zookeeper fed the walrus a bucket of fish. " 飼育係はセイウチにバケツ一杯の魚を与えました。 animal organism biology nature environment AIとチャット語彙ゲーム読解練習