广播电视英语短句 第 67 课：产生蜡状物-3

But extra wax can harden and form a blockage that interferes with sound waves and reduces hearing. 但是过多的耳垢可能会变硬并且形成阻碍物，干扰声波降低听力。

People can also cause a blockage when they try to clean out their ears -- but only push the wax deeper inside. 当试图清理耳朵时，人们遇到阻碍，因为他们把耳垢推进了深处。

Earwax removal is sometimes necessary. But you have to use a safe method or you could do a lot of damage. 有时候清除耳垢是必要的，但是你必须使用安全的方式否则可能造成巨大损失。

Experts at N.I.H., the National Institutes of Health, suggest some ways to treat excessive earwax yourself. 美国国立卫生研究院的专家建议了几种自己动手去除多余耳垢的方法。

They say the wax can be softened with mineral oil, glycerin or ear drops. 专家说矿物油、甘油或者滴耳可以使耳垢软化。