The idiom is: by the skin of one's teeth.

切齿。

He grinded his teeth and scowled.

他切齿，怒目而视。

He ground his teeth and looked fierecely at the traitor.

他切齿，恶习狠狠地盯着叛徒。

How the other red hats would gnash their teeth in envy.

其他红衣主教该切齿地嫉妒不已啊。

" Dumbledore happens to trust me, " said Snape through clenched teeth.

“邓布多恰好很信任我，”斯内普切齿地说。

I'm on the new captain's hit list and my partner's.

那位新警长恨我恨得切齿 我那位搭档也是。

“I bet Dumbledore saw right through you, ” said Harry, his teeth gritted.

“我敢说邓布多早把你看透了。” 哈切齿地说。

What about some of the characters who make office life so teeth-grinding?

对于那些让你在办公室生活中切齿角色，又该么办呢？

They squirmed, kicked, flailed their sharp little fists, and gnashed their teeth.

他们扭动着身体，两脚乱蹬，挥着尖尖小拳头，切齿。

" I hated it, " she said bitterly. " I loathed it."

" 我讨厌它，" 她切齿地说，" 我厌恶它。"

" Oh, 'ow I 'ate 'im! 'Ow I 'ate 'im" ! he gritted out.

" 我恨死他了！ 我恨死他了！" 他切齿地说。

I closed my eyes and inhaled slowly through my nose, aware that I was gritting my teeth.

闭上眼睛，鼻子慢慢地吸着气，意识到自己在切齿了。

“Dumbledore's been driven out of this castle by the mere memory of me! ” he hissed.

“我只不过用了我记忆，就把邓布多赶出了这座城堡！”他切齿地说。

The crime beat boys must have gnashed their teeth and gnashed them in vain.

罪打小子肯定是切齿， 白白切齿了。

“As I've told you, ” he said through gritted teeth, “Kingsley is protecting the Mug—I mean, your Prime Minister.”

“我告诉过你了，”他切齿说，“金斯莱要保护麻——我意思是，你们首相。”

That's what you're shoving between your teeth.

这就是你切齿东西。

And you definitely don’t want it in your teeth.

而且您绝对不希望它切齿。

He stamped and ground his teeth with rage.

他气得直跺脚， 切齿。

' Will's voice emerged through gritted teeth.

’威尔声音从切齿中传出。

" Get out of my way, " he said between his teeth.

“让开，” 他切齿地说。