noun 下载 🔗分享 煤块,煤堆 A mass of coal holed or undercut so as to be thrown down by wedges. Examples : "The miners carefully prepared the jud of coal for blasting. " 矿工们小心翼翼地准备着这块已经挖空底部的煤块,以便爆破。 material geology industry work 与AI对话词汇游戏阅读练习