In-ear phones like Etymotic's ER6 go deep into the ear canal.
像音特美 ER6 这样的内置式耳机可以深入耳道。
The ear canal also named middle ear splays out at the external position.
耳道亦称中耳，内小外大呈喇叭状。
The researchers suspect that the shape of the human ear canal may be to blame for the pain.
研究者猜测，人们之所以觉得痛苦，是由于人类耳道的形状造成的。
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