名词短语
中文翻译：感染的原因
同义词：
['infection cause', 'etiology of infection']
例句：
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1.The doctor found that the infection was caused by a bacteria.
医生发现感染是由一种细菌引起的。
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2.The patient's immune system is compromised due to the infection.
由于感染，患者的免疫系统受到了损害。
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3. The researcher discovered the cause of the disease through genetic analysis.
研究者通过基因分析发现了这种疾病的原因。