noun 下载 🔗分享 煤田,产煤区。 Any region containing deposits of coal that may be mined. Examples : "The Appalachian coalfield provides fuel for many power plants in the eastern United States. " 阿巴拉契亚煤田为美国东部地区的许多发电厂提供燃料。 geology area environment geography material industry fuel 与AI对话词汇游戏阅读练习