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  1. undulation

    • IPA[ˌənjəˈlāSH(ə)n]

    美式

    • n.
      the action of moving smoothly up and down;a smoothly rising and falling form, outline, or movement
    • noun: undulation, plural noun: undulations

    • 釋義

    名詞

    • 1. the action of moving smoothly up and down the soft undulation of the waves animates the scene
    • a smoothly rising and falling form, outline, or movement the road follows the undulations of the countryside
    • 更多解釋
    • IPA[ˌʌndjʊˈleɪʃ(ə)n]

    英式

    • n.
      the action of moving smoothly up and down: the soft undulation of the waves animates the scene

    Oxford Dictionary