noun 다운로드 🔗공유 광석 Rock or other material that contains valuable or utilitarian materials; primarily a rock containing metals or gems for which it is typically mined and processed. Examples : "The miners extracted iron ore from the deep underground mine. " 광부들은 깊은 지하 광산에서 철광석을 채취했다. geology material industry mineral AI와 채팅어휘 게임독해 연습