详细解释: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 populationa superiority in numbers or amount同义词：preponderance