名词
中文翻译：污泥
同义词：
['sludge', 'scum', 'sludge', 'scum']
例句：
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1. The river is covered in a thick layer of scum.
这条河上覆盖着厚厚的一层浮渣。
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2. The fisherman had to remove the scum from the lake.
渔民不得不从湖中清除浮渣。
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3. The city was covered in a layer of scum due to pollution.
由于污染，城市被一层浮渣所覆盖。