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1.The intestinal bacteria play a crucial role in digestion.
肠道细菌在消化过程中起着至关重要的作用。
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2.Researchers are studying the relationship between intestinal bacteria and mental health.
研究人员正在研究肠道细菌与心理健康之间的关系。
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3. Intestinal bacteria can be beneficial or harmful depending on their composition.
肠道细菌可以是有益的,也可以是有害的,这取决于它们的组成。