Health: Keeping Ears Clean (1/2) ( 本次听写约196词 )
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Some people's ears produce wax like busy little bees. This can be a problem even though earwax appeares appears to serve any earwaxan important purpose. Experters Experts say it protects and cleans the ear. It traps durt dirt and other matter and keeps insects out. Durt * Doctors think it might also help protect against infectionsand * . And the waxy oil keeps ears from getting to trytoo dry.
So erawax earwax is goodit . It even has a medical name, : cerumen. And there are two kinds. Most people of European or African and * ancestry have the " wet" kind: thick and sticky. East Asian's Asians commonly have " dry" earwax. But you can have 2 too much of a good thing.
The * glands in the ear can now canal that produce the wax may make too much in some people. Earwax is normally expelled; it falls out of the ear or get wash the waygets washed away. But extra wax can * harden and form a blockage that interference interferes with some wax sound waves and reduces hearing.
People can also calls cause a blockage when they try to clean out their ears . But you -- but only push the wax deep deeper inside. Earwax removal is sometimes necessary. But you have to use a safe method or you could do a lot of damage.
听写于:2008-11-25 12:27 | 用时:28:33 | |
正确率:81 %(+15分) | 错误:41个单词 |
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