noun ダウンロード 🔗共有 階段状の席、観覧席 Any of a series of terraced steps or seats, as in an arena or an altar. Examples : "The priest placed candles on each gradin of the altar, leading up to the crucifix. " 司祭は十字架へと続く祭壇の階段状の席にそれぞれろうそくを置いた。 architecture building structure place AIとチャット語彙ゲーム読解練習