claspers

例句：

1. 1. The dress has several clasps at the back to keep it closed.
   这件衣服后面有几个扣子来保持它闭合。
2. 2. She fastened the buttons on her coat with a needle and thread.
   她用针线把扣子缝在了外套上。
3. 3. The children were busy trying to unfasten the clasps on their backpacks.
   孩子们忙着试图解开他们背包上的扣子。