动词
中文翻译：滚动
同义词：
['roll', 'roll down', 'descend', 'descend', "roll over例句：1. The car's wheels are designed to roll down smoothly.（汽车的车轮设计成可以顺畅地滚动。）"]
例句：
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1. The car's wheels are designed to roll down smoothly.
汽车的车轮设计成可以顺畅地滚动。
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2.The snow was so heavy that it rolled down the hill.
雪下得很大，以至于滚下了山坡。
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3. Roll down the window and let some fresh air in.
把窗户开得大一些，让新鲜空气进来。