名词
中文翻译：污泥层
同义词：
['sludge layer', 'scum layer', 'sludge layer']
例句：
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1.The city's sewage system is constantly being cleaned to remove the scum layer.
城市的污水处理系统一直在清理，以去除污泥层。
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2. The scientist found a new way to treat wastewater that effectively removed the scum layer.
科学家发现了一种新的方法来处理废水，有效地去除污泥层。
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3.The construction workers were required to wear masks to prevent the spread of the scum layer during the cleanup process.
建筑工人被要求戴口罩，以防止在清理过程中传播污泥层。