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

克拉布不笑了，开始恶狠狠地揉着他那板栗似的指关节。

To knuckle down, by the way, means to start working hard.

knuckle down指开始认真工作。

First thing, " we need to knuckle down" .

第一，“我们必须全力以赴”。

MIke's been to Berlin and bangs on about how amazing pork knuckles are.

迈克去过柏林，他一猪蹄有多好吃。

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

哈利和罗恩又坐了下来，罗恩抚摩着手指关节。

Goyle cracked his knuckles threateningly and Malfoy whispered something undoubtedly malevolent to Crabbe.

高尔威胁地把指关节捏得嘎吱响，马尔福声对克拉布了些什么，显然恶意的话。

I need to do away with my knuckle cracking.

我要戒掉掰手指节的习惯。

Harry kneaded his forehead with his knuckles.

哈利用指关节揉了揉伤疤。

That's the sound my knuckles make when it's moist in the air.

这空气很潮湿的时候我关节发出的声音。

Yeah, but did you see the dents in his knuckles? That means he's artistic.

但，你看见他指关节上的凹凸么？ 那明他艺术家。

Fried razor clams with black beans, pork knuckle, typhoon shelter crab.

豉椒炒蛏子、猪手、避风塘炒蟹。

We all looked—the knuckle was black and blue.

我们大家都瞧了——指关节有点青紫。

The girl tapped the door with her knuckles.

女孩用指关节轻轻敲门。

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

你可能会点脚、掰动指关节或咬嘴唇。

Uncle Vernon rapped the glass smartly with his knuckles, but the snake just snoozed on.

弗农姨父用指节狠狠地敲玻璃，可大蟒继续打盹。

With white knuckles and a pink helmet, the tour began.

兴奋、紧张中带着一粉色的头盔，这趟行程开始了。

Thornton rapped Hal's knuckles with the axe-handle, knocking the knife to the ground.

哈尔的手背刚一被桑顿那根斧头柄敲了一下，刀就应声落地。

He rapped his knuckles again as he tried to pick it up.

哈尔准备捡起刀时，桑顿又朝哈尔的手背敲了一下。

That's why some people can crack their knuckles or other joints on command.

这就为什么有些人可以别人的命令之下，把指关节或其他关节弄出喀嚓声。

And Goyle cracked his knuckles threateningly and Malfoy whispered something undoubtedly malevolent to Crabbe.

高尔威胁地把指关节捏得嘎吱响，马尔福声对克拉布了些什么，显然恶意的话。