今天我们要学的词是 prevalent.

prevalent 的意思是普遍的、广为流行的。 In 1981, Mauritania became the last country in the world to abolish slavery. But the problem is still prevalent, and the government is doing little to combat it. 毛里塔尼亚在1981年成为世界上最后一个废除奴隶制的国家，但蓄奴问题仍然很普遍，政府几乎没有采取打击行动。

Researchers found that prolonged sitting is highly prevalent among Americans, despite health warnings that long periods of sitting can increase risks for obesity, diabetes, heart disease and some cancers. 研究人员发现，长时间坐着在美国人中非常普遍，尽管健康警示显示那会增加肥胖、糖尿病、心脏病和某些癌症的风险。