复数： knuckles
第三人称单数： knuckles
过去式： knuckled
过去分词： knuckled
现在分词： knuckling

Knuckle bumps are a fantastic alternative to saying goodbye .

指关节弯曲也是一种不错的道别方式的选择。

You may not be a knuckle cracker yourself but chances are you have heard someone doing it .

你可能不会使自己的指关节响动，但一定看到过别人这样做。

On her right index-finger knuckle is a perfect red dot , like a stamp of quality from the manufacturer .

在她的右手食指指关节有一个完美的红点，就像生产者生产的优质邮票。

If you rap it with your knuckle you hear the thwack of gypsum rather than the ring of cold metal .

如果用指关节击之，能听见石膏的闷响，而非冷冰冰的金属发出的鸣响。

After being warned by his mother to swear off that demon knuckle cracking , young donald unger tested the accuracy of this hypothesis on himself .

自从小时候受到母亲警告说不可以敲打指关节后，小唐就开始在自己的身上测试这种推断的准确性。