noun 下载 🔗分享 磨石,砂轮。 An abrasive wheel for sharpening, polishing or grinding. Examples : "The blacksmith used the grindstones to sharpen his swords and axes. " 铁匠用砂轮来磨利他的剑和斧头。 machine industry 与AI对话词汇游戏阅读练习