external ear是什么意思 external ear怎么读
external ear的英文翻译是什么意思，词典释义与在线翻译
Noun:- the part of the ear visible externally
external ear的用法和样例
- Gently pull upward to straighten the ear canal.
轻轻的向上拉外耳是耳沟弄直。 - This outer ear, however, is nothing but a sound-gathering trumpet.
其实，外耳只不过是收拢声音的喇叭。
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