名词
中文翻译：Unknown
同义词：
['bacterial mass', 'bacterial aggregate', 'bacterial cluster']
例句：
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1. The bacteria in the soil were clumped together due to the lack of oxygen.
土壤中的细菌由于缺乏氧气而聚集在一起。
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2. The researchers found that the bacteria clumped together in a way that could be beneficial for their survival.
研究人员发现，这些细菌以一种对它们生存有益的方式聚集在一起。
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3. The clumped bacteria were difficult to remove from the surface of the skin, making it prone to infection.
这种聚集的细菌难以从皮肤表面清除，容易引发感染。