tiepin

例句：

1. 1. The dress has a beautiful tiepin at the neck.
   这件衣服的领口有一个漂亮的扣子。
2. 2. She carefully placed her tiepin on the table.
   她小心翼翼地将她的扣子放在桌子上。
3. 3. The old man used to wear a tiepin as a symbol of his wealth.
   这位老人过去常常用一个扣子作为他财富的象征。