名词
中文翻译：死亡率比率
同义词：
['mortality rate', 'mortality percentage']
例句：
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1. The mortality ratio for this diseaseis 2%.
这种疾病的死亡率为2%。
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2. The mortality ratio of the population hasincreased significantly in recent years.
近年来，人口死亡率显著上升。
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3. The mortality ratio is acrucial factor in determining the success of avaccine.
死亡率是决定疫苗成功与否的关键因素。