noun ダウンロード 🔗共有 ケイ酸塩 Any salt of silica or of one of the silicic acids; any mineral composed of silicates Examples : "Many rocks and minerals, like quartz and feldspar, are made of silicates. " 水晶や長石など、多くの岩石や鉱物はケイ酸塩でできています。 mineral geology chemistry substance compound material AIとチャット語彙ゲーム読解練習