广播电视英语短句 第 67 课：产生蜡状物-2

So earwax is good. It even has a medical name: cerumen. And there are two kinds. 所以说，耳垢是有益的！它甚至还有一个医学名字：耵聍。并且有两种类型。

Most people of European or African ancestry have the "wet" kind: thick and sticky. East Asians commonly have "dry" earwax. 欧洲血统或者非洲血统的大部分人都有湿耳垢：黏黏的。东亚血统的人通常都有干耳垢。

But you can have too much of a good thing. 但是你不能有太多的好事。

The glands in the ear canal that produce the wax make too much in some people. 腺体位于耳道，能够产生耳垢。某些人的腺体会产生过多的耳垢。

Earwax is normally expelled; it falls out of the ear or gets washed away. 所以耳垢会自然的排除，掉出来或者被冲洗掉。