noun 下载 🔗分享 二氧化硅，硅石。 Silicon dioxide. Examples : "The beach is made of sand, which is mostly composed of silicas. " 这个沙滩由沙子构成，而沙子主要由二氧化硅组成。 material substance chemistry geology compound 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 硅石，二氧化硅。 Any of the silica group of the silicate minerals. Examples : "The geologist collected various rock samples containing different silicas, like quartz and opal. " 这位地质学家收集了各种岩石样本，其中含有不同的硅石，例如石英和蛋白石。 mineral geology substance material 与AI对话词汇游戏阅读练习
