Examples

她一边说话，一边捏弄着毛衣上的纽扣。

As she talked, she fiddled with the buttons on her sweater. → 捏弄

钉纽扣

sew a button on → 纽扣

纽扣虽小，作用却极大。 → 纽

妈妈在为我的新衣服钉纽扣。 → 纽扣

那是一件设计非常特别的上衣, 连纽扣都是用的子母扣儿。

That jacket has a unique design; even its buttons are made of snap fasteners. → 子母扣儿

扣上纽扣 → 扣

纽扣 → 纽

jackets with buttons down the front

前面有纽扣的上衣 → front

his shirt was missing a button

[inf] 他的衬衫少了一粒纽扣 → miss