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  1. arduous

    • IPA[ˈärjo͞oəs]

    美式

    • adj.
      involving or requiring strenuous effort; difficult and tiring
    • 釋義

    形容詞

    • 1. involving or requiring strenuous effort; difficult and tiring an arduous journey
    • 更多解釋
    • IPA[ˈɑːdjʊəs]

    英式

    • adj.
      involving or requiring strenuous effort; difficult and tiring: an arduous journey

    Oxford Dictionary