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undulation英英字典_undulation剑桥英语解释_undulation柯林斯英文解释_生查子网韦伯词典
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undulation

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柯林斯词典

    undulation /ˌʌndjʊˈleɪʃən/

  • 1. N the act or an instance of undulating 連緜起伏

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