名词
中文翻译：主要感染
同义词：
['primary infection', 'primary disease']
例句：
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1.The main infection in this region is the common cold.
该地区的主要感染是感冒。
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2. The patient was diagnosed with a primary infection of the lungs.
病人被诊断出肺部的初次感染。
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3. The research team focused on identifying the primary infection causing the outbreak.
研究团队专注于识别引发疫情的初次感染。