noun 下载 🔗分享 石英，二氧化硅。 The most abundant mineral on the earth's surface, of chemical composition silicon dioxide, SiO2. It occurs in a variety of forms, both crystalline and amorphous. Found in every environment. Examples : "The geologist found a beautiful piece of quartz in the park. " 地质学家在公园里发现了一块漂亮的石英石。 geology mineral material chemistry science environment nature 与AI对话词汇游戏阅读练习
