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

咬牙切齿。

He grinded his teeth and scowled.

他咬牙切齿，怒目而视。

He ground his teeth and looked fierecely at the traitor.

他咬牙切齿，恶习狠狠地盯着叛徒。

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

其他红衣主教该怎样的咬牙切齿地嫉妒不已啊。

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

“邓布利多恰好很信任我，”斯内普咬牙切齿地说。

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

那长恨我恨得咬牙切齿 我那搭档也是。

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

“我敢说邓布利多早把你看透了。” 哈利咬牙切齿地说。

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咬牙切齿的角色，又该怎么办呢？

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

他们扭动着身体，两脚乱蹬，挥着尖尖的小拳头，咬牙切齿。

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

" 我讨厌它，" 她咬牙切齿地说，" 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！" 他咬牙切齿地说。

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，意识到自己在咬牙切齿了。

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

“我只不过利用了我的记忆，就把邓布利多赶出了这座城堡！”他咬牙切齿地说。

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

罪打小子肯定是咬牙切齿， 白白咬牙切齿了。

“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，”他咬牙切齿的说，“金斯莱要保护麻——我的意思是，你们的首相。”

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

这就是你咬牙切齿的东西。

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

而且您绝对不希望它咬牙切齿。

He stamped and ground his teeth with rage.

他气得直跺脚， 咬牙切齿。

' Will's voice emerged through gritted teeth.

’威尔的声音从咬牙切齿中传出。

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

“让开，” 他咬牙切齿地说。