attachment ring

例句：

1. 1. The company's new product line includes an attachment ring for the smartphone.
   该公司的新产品线包括一个适用于智能手机的附件环。
2. 2. The attachment ring on the door handle is a convenient way to secure it.
   门把手上的附件环是一种方便的固定方式。
3. 3. The attachment ring was designed to prevent the phone from slipping out of my hand.
   附件环的设计是为了防止手机从我手中滑落。