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。
The US researchers behind that study concluded: 'The chief morbid consequence of knuckle cracking would appear to be its annoying effect on the observer. '
这项研究的美国研究员总结道：“掰指关节的主要不良后果在于，关节的响声会让周围的人感到不舒服。”
Introduced are the research achievements in improving the service lives of sliding bearing and coupler knuckle, as well as the non destructive inspection for hot cracking in Japan.
介绍日本在提高滑动轴承和钩舌寿命方面的研究成果及车轮热裂的无损检测。
Like Joey's constant knuckle-cracking isn't annoying?
像乔伊，常扳指关节就不惹人厌吗？
Like Joey's constant knuckle-cracking isn't annoying?
像乔伊，常扳指关节就不惹人厌吗？
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