bounding [baundɪŋ]

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附加级

v.跳( bound的现在分词 )；弹回；向上弹；向上跳

The little horse is bounding. 小马在跳跃。来自《简明英汉词典》
Big rocks were bounding down. 巨石从上面滚下来。来自《简明英汉词典》