prevalence

1. The growing prevalence of alzheimer 's has also heightened anxiety about mental acuteness .

老年痴呆症的流行也增加了人们对于大脑敏锐程度的担心。

2. Nonetheless , the widespread prevalence of non-suicidal self-injury does represent a public health concern .

然而，非自杀式自虐行为的普遍流行确实代表一个公众健康问题。

3. Many countries in the middle east impose strict restrictions-and also report among the lowest hiv prevalence rates .

许多中东地区的国家实施了最严格的限制措施，同时也被报道为艾滋病流行率是最低的。

4. More recent research shows a considerably higher prevalence .

最近更多的研究表明这种行为相当普遍。

5. Smoking prevalence has stalled at 20 percent of adults and , ominously , about the same proportion of high school seniors .

吸烟的流行使百分之二十的成年人陷于泥潭中，不幸的是，高中生有着一样的比例。

more: >如何使用 "prevalence" 造句