prevalence
英 ['prev(ə)l(ə)ns; 'prevəl(ə)ns; 'prevələns]
美['prɛvələns]
- n. 流行；普遍；广泛
英英释意
- 1. the quality of prevailing generally; being widespread;
- "he was surprised by the prevalence of optimism about the future"
- 2. (epidemiology) the ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population
- 3. a superiority in numbers or amount;
- "there is a preponderance of Blacks in our prisons"