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1·He gripped the wheel until his knuckles whitened.

他紧紧握住方向盘，握得指关节都变白了。《牛津词典》

2·Brenda's knuckles were white as she gripped the arms of the chair.

布伦达紧紧抓着椅子的两个扶手时指关节白了。《柯林斯英汉双解大词典》

3·If they broke down in their make-believe he rapped them on the knuckles.

如果他们在假装的时候半途而废了，他就会敲他们的指关节。

4·I looked at my dad, his knuckles swollen and cracked from farm work and his fingernails tipped with black crescents of motor oil.

我看着我爸爸，他的指关节因农活而肿胀开裂，他的指甲尖被机油染成了一轮黑色的新月。

5·He felt weak and sore, and the pain of his smashed knuckles warned him that, it would be a week before he could grip a pick handle or a shovel.

他感到虚弱和疼痛，他那被砸碎的指关节发出的疼痛警告他，要过一个星期才能抓得住镐柄或铁锹。

6·Some groups would get each other's attention by rapping branches with their knuckles, while others did it by loudly ripping leaves with their teeth.

一些群体会通过用指关节敲树枝的方式来互相博取关注，而另一些群体则是以大声撕咬叶子来吸引注意力。

7·We got a rap over the knuckles for being late.

我们因为迟到而受到严厉训斥。《牛津词典》

8·Her knuckles whiten as she clenches her hands harder.

她的手握得越来越紧，指节都变白了。《柯林斯英汉双解大词典》

9·His fists clenched slowly until his knuckles were white.

他的拳头慢慢地捏紧，直捏得指关节都发白了。《牛津词典》

10·I joined the workers on strike and was rapped on the knuckles.

我加入了工人们的罢工，结果遭到了训斥。《柯林斯英汉双解大词典》

(1)steering knuckle转向关节

(1)knuckle down屈服；开始认真工作

(1)near the knuckle[口语](笑话等)近乎猥亵的，近乎下流的，近乎粗鄙的

(1)knuckle sandwich对准嘴的一拳