2 sentences for 扣 (kòu — button)

1. 这颗扣看起来非常别致。

   zhè kē kòu kàn​qǐ​lai fēi​cháng bié​zhì.

   This button looks very unique.

   Source: Dong Chinese Dictionary

2. 老师帮那个小女孩缝好了外套上掉落的钮扣。

   lǎo​shī bāng nà gè xiǎo nǚ​hái féng​hǎo le wài​tào shàng diào​luò de niǔ kòu.

   The teacher helped the little girl sew back the button that had fallen off her coat.

   Source: Dong Chinese Dictionary