英语词汇coal-fields是什么意思，coal-fields的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典-觉斋网

单词	coal-fields
释义	DEFINITIVE EXAMPLES 权威例句Most coal-fields began life as swamps about 300 million years ago.大多数煤田都是由大约三亿年前的沼泽地发展形成的。剑桥国际
随便看	upkeep charges upkeep cost upkeep cost upkeep costs upkeep costs upland upland upland upland upland cotton upland cultivator upland game upland goose upland plough upland rice upland soil upland speedwell upland white aster uplands uplands uplands uplift uplift uplift uplift stress

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