prevalence汉语翻译：
n. 普遍, 流行, 广泛
【医】 流行, 盛行英语解释：
名词 prevalence:

the quality of prevailing generally; being widespread

(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

a superiority in numbers or amount同义词：preponderance

例句：

I'm shocked at the prevalence of bribery among these officials.我对这些官员的普遍受贿感到震惊。

They are so surprised by the prevalence of anti-government sentiments.他们对普遍存在的 * 情绪感到很吃惊。

详细解释：
prev.a.lence
n.（名词）
The condition of being prevalent.
流行：盛行的状况
Medicine The total number of cases of a disease in a given population at a specific time.
【医学】 疾病的流行程度：某一特定时间里在给定数目的人群中所有患病的人数