bouncing ball

基本解释

For example, a bouncing ball tends to have a lot of ease in and out when at the top of its bounce.
例如，一个弹跳的球在它跳到顶部时趋向于缓入和缓出。
blog.sina.com.cn
When play restarted almost immediately a bouncing ball was contested and water and sweat flew off the players' heads.
几乎是在比赛刚刚重新开始时，就出现了争抢反弹球的场面，水和汗夹从球员的头上飞溅出来。
It's the most important aspect, and the part on which the whole cycle rests… just imagine that the hips are a bouncing ball that to give weight and rhythm to the cycle.
这是最重要的一环，是整个运动都要依赖的一分，只需要把胯想象成一个跳跃的球，它将带给整个循环以重量和节奏。

His records include bouncing a ball the fastest for one mile,or 1.6 kilometers, on the Great Wall of China.