prevalence
noun /ˈprevələns/
/ˈprevələns/
[uncountable] (formal)- the fact of existing or being very common at a particular time or in a particular place
在特定时间或特定地点存在或非常普遍 - an increase in the prevalence of smoking among young people
年轻人吸烟率的上升
- an increase in the prevalence of smoking among young people