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  1. Oxford Dictionary

    undulate

    • v.
      move or go with a smooth up-and-down motion；have a smoothly rising and falling form or outline
    • adj.
      (especially of a leaf) having a wavy surface or edge.

    • verb: undulate, 3rd person present: undulates, gerund or present participle: undulating, past tense: undulated, past participle: undulated

    • 釋義

    動詞

    • 1. move or go with a smooth up-and-down motion the surface of the liquid undulated gently her body undulated to the thumping rhythm of the music
    • ▪ have a smoothly rising and falling form or outline the landscape rolled and undulated for miles in every direction

    形容詞

    • 1. (especially of a leaf) having a wavy surface or edge.