jackhammerjackhammer /ˈdʒækˌhæmɚ/ noun [countable] 
a large powerful tool used to break hard materials such as the surface of a road
a large powerful tool used to break hard materials such as the surface of a road
| 单词 | jackhammer |
| 释义 | jackhammerjackhammer /ˈdʒækˌhæmɚ/ noun [countable] a large powerful tool used to break hard materials such as the surface of a road |
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