back bead

例句：

1. 1. The dress has a beautiful back bead that catches the eye.
   这件衣服有一个漂亮的背扣，很吸引人。
2. 2.She carefully fastened the back bead before leaving the house.
   她离开房子前仔细地系好了背扣。
3. 3.The designer used a unique back bead design to add a touch of elegance to the outfit.
   设计师使用了独特的背扣设计来给这件衣服增添一丝优雅。