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汉语拼音：niǔ kòu

用玻璃、贝壳、骨头、木头、皮革或布作的小圆片、小球或其他形状的东西，有几个孔眼或一个后凸，缝在或固定在物体（如衣服或室内装璜）上，穿过扣眼或线圈作紧固或装饰用--又作纽扣、纽子。

1. 即纽扣。可以把衣服扣起来的小形球状物或片状物。

   清 潘荣陛 《帝京岁时纪胜·皇都品汇》：“马公道，广锡铸重皮钮扣。” 叶圣陶 《隔膜·欢迎》：“他的国货草帽摆在炕几上，马褂全卸了钮扣。” 老舍 《四世同堂》四五：“ 瑞宣 淡淡的一笑，随手又系上个钮扣。”

• We found a brass button in his stomach, and a round ball, and lots of rubbage.

  我们在他肚子里找着一个铜钮扣，一个圆球，还有许多乱七八糟的东西。

• As a duck with its eyelids, so he with his nose Trims his belt and his buttons, and turns out his toes.

  它用自己的鼻子，正像鸭子用自己的眼睑一样，整理自己的腰带和钮扣，还把脚趾向外扭转。

• He arrived at Paddington Station and smartly turned out in his best suit, favorite Panama hat and a red rose in his buttonhole.

  他到达帕丁顿车站，穿得漂漂亮亮的在他最好的西装，喜爱的巴拿马草帽，一束红玫瑰，在他的钮扣。

• A generally disk-shaped fastener used to join two parts of a garment by fitting through a buttonhole or loop.

  钮扣通常为圆片状的固着物，用于穿过扣眼或扣环将衣服的两个部分连起来

• He was dressed in an hussar's jacket with gold buttons, shiny leather boots and an odd-looking wooden cloak sticking out of his back. '

  那人穿着钉了金钮扣的轻骑兵上衣和亮闪闪的皮靴，后背支棱着一件怪模怪样的木斗篷。

• There was one especially absent-minded young man in the assembly line who sewed on buttons.

  在装配线上有个缝钮扣的年轻人特别心不在焉。

• Such a cluster of buttons is called a "connected component" in a "random graph" , where a graph is just a set of nodes connected by lines.

  这种成集群的钮扣被称为“随机图”中的“相互连接着的组件”，其中的“图”就是一些由线连接的节点的集合。

• Observing on his left cheek a bloodstain the size of a button, she leaned over to look at it carefully and laid one Finger on it.

  黛玉因看见宝玉左边腮上有钮扣大小的一块血渍，便欠身凑近前来，以手抚之细看。

• putting back his handkerchief he took out the soap and stowed it away , buttoned into the hip pocket of his trousers.

  他放回手绢时取出肥皂，然后把它塞进裤后兜，扣上钮扣。