动词短语
中文翻译：滚下
同义词：
['roll over', 'roll down', 'tumble off']
例句：
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1.The car rolled off the road and landed in a ditch.
汽车从路上滚落下来，掉进了一个沟里。
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2. The children were rolling around in the grass, enjoying themselves.
孩子们在草地上滚来滚去，玩得很开心。
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3. The snow was rolling off the roof of the house, covering the ground below.
雪正在从房子的屋顶上滚落下来，覆盖了下面的地面。