wrecking ball
noun [ C ] mainly US uk/ˈrek.ɪŋ ˌbɔːl/ us/ˈrek.ɪŋ ˌbɑːl/ (UK usually demolition ball)
（拆除房屋等用的）落锤
a large, heavy metal ball that is swung against a building in order to knock it down because it is no longer needed
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