1. Could it be the prevalence of tea in their culture? 是因为茶在他们的文化中流行而造成的吗？
2. The prevalence of black and Asian faces among those targeted has caused especial resentment. 黑人和亚洲人的面孔在那些目标人群中普遍存在，这引起了特别的不满。
3. Epidemiological studies have found that children with PDD have no higher prevalence of gastrointestinal tract than normal children. 流行病学研究发现，广泛性发育障碍（Pervasive Developmental Disorder）孩子和正常孩子相比较并没有更高的胃肠道患病率。
4. The prevalence of several silkworm diseases has led to a decline in silk products. Especially in France, the silk industry has never recovered. 几种桑蚕疾病的流行导致了丝绸产品下滑。特别在法国，丝绸工业再也没有恢复。
5. It's been well documented in extensive research over the years that prevalence rates for the majority of the anxiety disorders are higher in women than men. 多年来的广泛研究已经充分证明，大多数焦虑症在女性中的患病率要高于男性。
