四级In a multi-state study of assisted living , for instance, University of North Carolina researchers found that a host of variables—the facility's type, size or age; whether a chain owned it; how attractive the neighborhood was—had no significant relationship to how the residents fared in terms of illness, mental decline, hospitalizations or mortality.

在一个多状态的辅助生活研究中，例如，北卡罗来那大学的研究人员发现了大量的变量，设施的类型、大小或年龄；连锁店是否拥有它；社区的吸引力与居民的疾病、精神衰退、住院或死亡率没有显著关系。

2016年6月阅读原文

六级The Mediterranean groups had lower mortality rates in all age brackets and from all causes, particularly from heart disease.

地中海人群在所有年龄段和各种原因中的死亡率都较低，尤其是心脏病。

2017年12月六级真题（第一套）听力 Section C

考研Also, some research suggests that the explanation for rising rates of mortality, mental-health problems, and addiction among poorly-educated middle-aged people is shortage of well-paid jobs.

此外，一些研究表明，教育程度低的中年人死亡率、心理健康问题和上瘾率上升的原因是缺乏高薪工作。

2017年考研真题（英语二）完形填空 Section Ⅰ

六级Mortality rates from all causes, including disease and accidents, for American children are lower now than they were 25 years’ ago.

包括疾病和事故在内的所有原因导致的美国儿童死亡率现在都低于25年前。

2009年6月英语六级真题

四级In a multi-state study of assisted living, for instance, University of North Carolina researchers found that a host of variables—the facility's type, size or age；whether a chain owned it；how attractive the neighborhood was—had no significant relationship to how the residents fared in terms of illness, mental decline, hospitalizations or mortality.

例如，在一项关于辅助生活的多州研究中，北卡罗来纳大学的研究人员发现，许多变量——设施的类型、规模或年龄是否为连锁店所有该社区的吸引力与居民在疾病、精神衰退、住院或死亡率方面的表现没有显著关系。

2016年6月大学英语四级真题（第1套）

考研But the great universal of male mortality is being changed.

但男性死亡率的普遍性正在改变。

2000年全国硕士研究生入学统一考试英语试题