He put his ear close to the ring, turned a gear-wheel a notch and heard the faint, ominous click.

他把他的耳朵贴近戒指，打开齿轮的切口听到了微弱的不详的滴答声。

youdao

And it turns out that my left ear’s hearing is noticeably weaker in certain frequencies—it has what ear docs call the “noise notch” that afflicts those exposed to serious sound.

原来我的左耳对某些频率的声音特别不敏感——这就是医生们所说的“噪音空隙”，它们困扰着那些在噪声下工作过的人们。

youdao

Every little bump and notch in the human ear has a name but I have to say that tragus is the funniest.

耳朵上的每一个小突起和凹槽都有各自的名称，但是我不得不说tragus是最有趣的。

youdao