punchball
noun [ C ] UK uk/ˈpʌntʃ.bɔːl/ us/ˈpʌntʃ.bɑːl/ (US punching bag)
(悬挂在空中供练习拳击用的)吊袋,拳击梨球
a leather bag filled with air, hung from a frame or attached to a stand and used by boxers for training or exercise
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