详细解释:n. 必死的命运, 死亡数目, 死亡率
【医】 必死性, 死亡率
【经】 老死, 淘汰
词型变化：
名词复数:mortalities英语解释：
名词 mortality:
the quality or state of being mortalthe ratio of deaths in an area to the population of that area; expressed per 1000 per year同义词：deathrate, death rate, mortality rate, fatality rate