名词中文翻译
中文翻译：上下运动
同义词：
['vertical movement', 'vertical motion']
例句：
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1.The elevator is moving up and down the building.
电梯正在大楼里上下移动。
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2.The ball was bouncing up and down on the court.
球在球场上上下弹跳。
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3. The car was bouncing up and down on the road.
汽车在道路上上下颠簸。