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

克拉布不笑了，开始恶狠狠地揉他那板栗似的关节。

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

knuckle down是开始认真工作。

First thing, " we need to knuckle down" .

第一个，“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，他一直在说猪蹄有多好吃。

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

哈利和罗恩又坐了下来，罗恩抚手关节。

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

高尔威胁地把关节捏得嘎吱响，马尔福声对克拉布说了些什么，显然是恶意的话。

I need to do away with my knuckle cracking.

我要戒掉手节的习惯。

Harry kneaded his forehead with his knuckles.

哈利用关节揉了揉伤疤。

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

这个是当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.

但是，你看见他关节上的凹凸么？ 那说明他是个艺术家。

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——关节有点青紫。

The girl tapped the door with her knuckles.

女孩用关节轻轻敲门。

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

你可能会点脚、动关节或咬嘴唇。

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

弗农姨父用节狠狠地敲玻璃，可大蟒继续打盹。

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

在兴奋、紧张中带一个粉色的头盔，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.

这就是为什么有些人可以在别人的命令之下，把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.

高尔威胁地把关节捏得嘎吱响，马尔福声对克拉布说了些什么，显然是恶意的话。