Animals such as dogs and cats also have conspicuous outer ear, but few of us probably ever stopped to think whether there might be such a thing as a middle and inner ear beneath those pointed tips.

• 诸如猫和狗这样的动物也有引人注目的外耳，但很少人能够停下来去想，在竖立的尖儿下面，是否那里也有类似于中耳和内耳的东西。