| 单词 | mortality |
| 释义 | mortality n[U] 1 state of being mortal 不免一死. 2 (also mor`tality rate) number of deaths in a specified period of time 死亡率 Infant mortality (ie The rate at which babies die) was 20 deaths per thousand live births in 1986. 1986年的婴儿死亡率为生育成活率的千分之二十. 3 large number of deaths caused by a disease, disaster, etc （疾病、 灾难等造成的）大量死亡. |
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