名词
中文翻译：自然焦点感染同义词
同义词：
['natural focus infection', 'natural foci infection']
例句：
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1. The study found that the natural focal infection rate was higher in urban areas than in rural areas.
研究发现，城市地区的自然焦点感染率高于农村地区。
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2. The research team focused on identifying the natural focal infection sites in the region.
研究团队专注于识别该地区的自然焦点感染点。
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3. The disease is primarily transmitted through natural focal infections, which can be controlled by vaccination.
该疾病主要通过自然焦点感染传播，可通过疫苗接种进行控制。