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heavy-duty
adjective
  1. 1
    strong and not easily damaged 结实的;耐用的

    heavy-duty plastic 重型塑料

    heavy-duty diesel engines 重型柴油引擎

     Synonyms and related words
    Strong and not easy to damage or break: strong, irresistible, sturdy...
  2. 2
    mainly American informal very serious 非常严肃的;需认真对待的

    a heavy-duty conversation 非常严肃的谈话

     Synonyms and related words
    Serious, severe and extreme: serious, severe, extreme...
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