名词中文翻译
中文翻译：低等级煤
同义词：
['coal', 'bituminous coal', 'anthracite coal例句：1. The mine produces low rank coal that is used for heating and electricity generation.（该矿生产低等级煤，用于供暖和发电。）']
例句：
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1. The mine produces low rank coal that is used for heating and electricity generation.
该矿生产低等级煤，用于供暖和发电。
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2. Low rank coal is a valuable resource that can be used to generate energy.
低等级煤是一种宝贵的资源，可以用来发电。
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3. The low rank coal mine has been closed due to environmental concerns.
由于环境问题，这个低等级煤矿已经关闭了。