VOA慢速英语2013.07.09 英语, medical, 欧洲人, 非洲人, people

Rebecca949

So earwax is good. It even has a medical name: cerumen. And there are two kinds. Most people of European or African ancestry have the "wet" kind: thick and sticky. East Asians commonly have "dry" earwax.所以,耳垢是有益的,它甚至还有一个医学名称:耵聍.耳垢分两种类型.大部分欧洲人和非洲人都是"湿润型耳垢",又厚又粘.而东亚人是"干燥型"耳垢.
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xiaoxianaibibi

nice