名词
中文翻译：死亡率
同义词：
['morbidity', 'mortality rate例句：1. The study found a significant increase in mortality rates among the elderly population.（研究发现老年人的死亡率显著增加。）']
例句：
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1. The study found a significant increase in mortality rates among the elderly population.
研究发现老年人的死亡率显著增加。
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2. The government has been working to reduce mortality rates in the country.
政府一直在努力降低该国的死亡率。
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3.The researcher analyzed the data and found that there was a correlation between the two variables and their impact on mortality rates.
研究者分析了数据，并发现这两个变量之间存在相关性，并对死亡率产生影响。