名词
中文翻译：污泥指数
同义词：
['sludge content', 'sludge concentration']
例句：
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1.The sludge index is used to measure the amount of organic matter in a sample.
污泥指数用于测量样本中的有机物含量。
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2. The sludge index is an important indicator of wastewater treatment efficiency.
污泥指数是废水处理效率的重要指标。
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3.The sludge index is often used to determine the quality of soil and water.
污泥指数常用于判断土壤和水质的质量。