chuck ring

例句：

1. 1. The kids were playing with the chuck rings in the park.
   孩子们在公园里用弹跳环玩耍。
2. 2.He threw the ball into the chuck ring for a quick catch.
   他把球扔进弹跳圈，以便快速接住。
3. 3.The athletes used the chuck rings to improve their jumping skills.
   运动员们使用弹跳圈来提高他们的跳跃技巧。