noun ダウンロード 🔗共有 教科書、教材 A textbook, a book designed to accompany a specific academic course, or one specified by the writers of the course to be read by its students. Examples : "The professor said we need to buy the new coursebook for the history class. " 教授は、歴史の授業のために新しい教科書を買う必要があると言いました。 education literature writing language AIとチャット語彙ゲーム読解練習