VOA慢速英语2011.11.28 英语, produce, hearing, people

Rebecca949

But you can have too much of a good thing.
但是物极必反。
The glands in the ear canal that produce the wax make too much in some people. Earwax is normally expelled; it falls out of the ear or gets washed away. But extra wax can harden and form a blockage that interferes with soundwaves and reduces hearing.
一些人耳道中的腺体分泌过多的耳垢。一般情况下耳垢会从耳内脱落并自然排出。但是过多的耳垢会变硬形成堵塞物而干扰声波，降低听力。
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注释：
gland:腺体
canal:管道，运河，沟渠
expel: 驱逐，开除，排出
blockage：堵塞，封锁，妨碍

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