名词短语
中文翻译：煤炭衍生气体的数量
同义词：
['coal gas', 'coal-derived gas', 'coal gaseous', 'coal gases例句：1. The amount of coal-derived gas produced by the plant is significant.（该工厂产生的煤炭衍生气体数量很大。）']
例句：
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1. The amount of coal-derived gas produced by the plant is significant.
该工厂产生的煤炭衍生气体数量很大。
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2.The amount of coal-derived gas released into the atmosphere has been increasing.
释放到大气中的煤炭衍生气体数量正在增加。
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3. The amount of coal-derived gas in the mine is a concern for safety.
矿井中煤炭衍生气体的数量是安全问题的担忧。