名词
中文翻译：烟灰
同义词：
['dust', 'ash', 'smoke']
例句：
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1. The old man was coughing up soot from his pipe.
老人从他的烟斗里咳出煤烟。
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2. The factory produces a lot of soot during the day.
工厂在白天产生大量的煤烟。
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3. The firefighters had to put out the soot from the burning building.
消防员不得不扑灭燃烧建筑的煤烟。