扣子

例句：

1. 1. Shecarefully sewed the buttons on her coat.
   她仔细地给外套缝上了纽扣。
2. 2. The dress had a beautiful buttonholeat the neckline.
   这件连衣裙领口有一个漂亮的钮扣。
3. 3. He wore a buttoned shirt to school every morning.
   他每天早上都穿着有纽扣的衬衫去上学。