The sounds then travel down to the middle ear, the inner ear, and then to your brain.

声音向下传到中耳、内耳，然后传到你的大脑。

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Although Grodd now runs a site that lets educators share lesson plans, he started out teaching at inner-city middle schools in Atlanta and Boston.

尽管格洛德现在经营着一个网站，让教育工作者在那里分享课件，他开始时却是在亚特兰大和波士顿的中心学校任教。

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The ear is divided into three parts: outer, middle, and inner.

人的耳朵分为三部分，外耳，中耳，内耳。

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Their desire to stay in their inner Southeast neighborhood a middle-class area of one-story ranch houses and cottages that's a good bike commuting distance to Mr. Butler's office limited their options.

WSJ: A Bicyclists' House Built for Two

But Republicans are hardly the ideal champions for a measure that primarily benefits poor blacks in the inner cities not least because their own base, the middle-class suburbs, are perfectly happy with their local schools (which are often the reason why they live where they do).

ECONOMIST: Lexington

Yet the mayor realises where the proof of the pudding lies: whether middle-class parents en masse will feel happy to send their children to inner-city schools.

ECONOMIST: Mayor Daley��s arboretum