cold-water sphere

例句：

1. 1.The children played with the cold-water sphere in the park.
   孩子们在公园里用冷水球玩耍。
2. 2. The cold-water sphere is a popular sport for people of all ages.
   冷水球是一项适合所有年龄段人群的流行运动。
3. 3. The cold-water sphere was invented by a scientist who wanted to improve swimming skills.
   冷水球是由一位科学家发明的，他想要提高游泳技巧。