The girl tapped the door with her knuckles.

女孩用轻轻敲门。

Harry kneaded his forehead with his knuckles.

用揉揉伤疤。

It disappeared up to the second knuckle.

第二都陷进去。

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.

克拉布不笑，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。

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

和罗恩又坐下来，罗恩抚摩着手。

We all looked—the knuckle was black and blue.

我们大家都瞧——有点青紫。

Too many open questions in this case.

如果在亚伦•布朗上发现的油漆。

My fingers get cold, but my knuckles get hot.

我的手怕冷，但我的怕热。

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

他们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家伙，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。

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们。

If you crack your knuckles, you're gonna get arthritis when you're older.

如果你掰的话，那么你长大后就会患上炎。

Or you can pick it up on the back of your hands and use your knuckles.

或者你可以用手背把它拿起来，用。

Stretch up through the crown of the head, knuckles down towards the earth and then release.

通过头顶向上伸展，向下朝向下，然后慢慢放松。