VOA慢速英语2013.06.14 appears, problem, purpose, important, produce

Rebecca949

Some people's ears produce wax like busy little bees. This can be a problem even though earwax appears to serve an important purpose.一些人的耳朵像勤劳的小蜜蜂一样不断地分泌蜡质物(耳垢).这可能是个问题,虽然耳垢似乎起着非常重要的作用.
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