The outer ear is the part you can see.

外耳是你能看到的部分。

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Swimmer's ear is an infection of the outer ear canal.

游泳性耳炎是一种外耳道感染。

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The outer ear (the pinna) receives a single sound wave composed of different sounds.

外耳(耳廓)收集含不同声音的单声波。

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But you can use a swab or cloth to clean the outer part of the ear.

VOA: special.2010.03.31

We can see the early signs of ear development Start with the thickening of the outer layer of the embryo, this layer is called the ectoderm.

大家知道，耳朵发育的早期特征,是胚胎外层膜的增厚，这层膜也叫外胚层。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

With the head upright, take hold of the outer part of the ear.

VOA: special.2010.03.31

The soft-touch outer material around the ear-hooks makes them feel nice in the hand, and adds to the sporty look.

ENGADGET

At three months, it appeared to be a flexible and workable outer ear, the study concluded.

WSJ: Scientists use 3-D printing to help grow an ear