noun 下载 🔗分享 宝石,宝玉 A gem, usually made of minerals. Examples : "The jeweler carefully polished the emerald, a beautiful green gemstone. " 珠宝匠小心地打磨着那颗祖母绿,那是一颗美丽的绿色宝石。 mineral geology material 与AI对话词汇游戏阅读练习