mortality
/mɔːˈtælətɪ/noun
(pl. -ies) ［mass noun］
1
- the state of being subject to death必死性：
the work is increasingly haunted by thoughts of mortality.
这工作越来越让人产生必死无疑的想法。
2
- death, especially on a large scale（尤指大规模的）死亡：
the causes of mortality among infants and young children.
引起婴儿和幼童大量死亡的原因。
2.1
- （亦作mortality rate）the number of deaths in a given area or period, or from a particular cause死亡率：
post-operative mortality was 90 per cent for some operations.
一些手术的术后死亡率是90％.
词源
late Middle English: via Old French from Latin mortalitas, from mortalis （see MORTAL）.