单词punchball
n.: 梨球（用弹簧等固定，用于拳击等训练）网络: 潘趣翠球；沙袋；吊球
梨球（用弹簧等固定，用于拳击等训练）:
a heavy leather ball, fixed on a spring, which is punched, especially by boxers as a part of training, or as a form of exercise
复数：punchballs