名词
中文翻译：Unknown
同义词：
['compound coal', 'mixed coal', 'blended coal']
例句：
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1.The coal mine is located in a region with abundant natural resources.
煤矿位于资源丰富的地区。
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2. The coal industry has been facing challenges due to environmental regulations.
由于环境法规，煤炭行业面临挑战。
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3. The company plans to invest more in renewable energy sources, such as solar and wind power.
该公司计划增加对太阳能和风能等可再生能源的投资。