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to and fro motion短语解释_to and fro motion词组用法_to and fro motion短语词组_94生活常识网有道词典
94生活常识网有道词典

to and fro motion

T 开头单词

短语词组

    短语

  • to -and-fro motion 往复运动
  • up -and-down or to-and-fro motion 上下或往复的移动
    • 返回 to and fro motion