noun ダウンロード 🔗共有 氷河期 A glacial period (colloquially known as an ice age). Examples : "During the last series of glacials, large parts of North America were covered in thick ice sheets. " 最後の氷河期の間、北米の大部分は厚い氷床に覆われていました。 geology geography environment world nature science history age period AIとチャット語彙ゲーム読解練習