名词中文翻译1
中文翻译：Unknown
同义词：
['average life expectancy', 'average mortality rate', 'average life span']
例句：
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1. Thestudy found that the mean age at death for people in their 60s was significantly higher than those in their 40s.
研究发现，60岁人群的平均死亡年龄明显高于40岁人群。
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2. The researchers calculated the mean age at death for each group of people based on their medical records.
研究人员根据每个人的医疗记录计算了每个群体的平均死亡年龄。
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3.The mean age at death for all participants in the study was 75 years old.
研究中所有参与者的平均死亡年龄为75岁。