名词
中文翻译：链条结
同义词：
['link', 'linkage', 'clasp']
例句：
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1.The chain knots on the door are rusted and need to be tightened.
门上的链条扣生锈了，需要拧紧。
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2.The old man carefully tied his chain knots before leaving home.
老人在离家前小心翼翼地系好他的链条扣。
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3. The children played with their chain knots as a game.
孩子们用他们的链条扣做游戏。