noun 下载 🔗分享 晶洞,矿瘤。 A nodule of stone having a cavity lined with mineral or crystal matter on the inside wall. Examples : "While hiking, we found several geodes, each with sparkling amethyst crystals inside. " 徒步旅行时,我们找到了一些晶洞,每一个里面都闪耀着紫水晶。 geology mineral material nature 与AI对话词汇游戏阅读练习