The girl tapped the door with her knuckles.

女孩用轻轻敲门。

Harry kneaded his forehead with his knuckles.

哈利用揉了揉伤疤。

It disappeared up to the second knuckle.

第二都陷进去了。

Some people will crack their knuckles.

有些人会掰。

My thumb has one knuckle, notice the K is silent, but my other fingers have two knuckles, knuckles.

我的拇有一个，注意 K 是不发音的，但是我的其他手有两个，。

Crabbe stopped laughing and started rubbing his knuckles in a menacing way.

克布不笑了，开始恶狠狠地揉着他那板栗似的。

Each of my fingers has a knuckle.

我的每个手都有一个。

He knuckled the tears furiously from his eyes.

他气愤地用擦去眼中的泪水。

Harry and Ron sat down again, Ron massaging his knuckles.

哈利和罗恩又坐了下来，罗恩抚摩着手。

We all looked—the knuckle was black and blue.

我都瞧了——有点青紫。

You might tap your foot, crack your knuckles, or bite your lip.

你可能会点脚、掰动或咬嘴唇。

My fingers get cold, but my knuckles get hot.

我的手怕冷，但我的怕热。

Yeah, this bump on your knuckle is nothing.

是的，你上的这个肿块没什么。

Ennui stood up from the couch. She cracked her knuckles.

丧丧从沙发上站起来，掰了掰。

See how they tap them with their knuckles to make sure it's not bad?

他用轻敲每个胡桃确定是好或坏。

Like Joey's constant knuckle-cracking isn't annoying?

像Joey经常扳就不惹人厌吗？

Really hairy-knuckled types, y'know, raced through there.

真的是那种连上都长毛的伙，争先恐后。

Because your knuckles are like this.

因为你的是这样的。

But I saw his knuckles tighten convulsively on the wheel.

但我看见他抓着方向盘的痉挛着绷紧了。

It's meant to harden your knuckles so you don't break them if you get into a fight.

可以强健打架的时候就不会弄断它。