动词
中文翻译：使平滑
同义词：
['flatten', 'polish例句：1. The car was smooth as silk on the road.（汽车在马路上行驶得非常平稳。）']
例句：
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1. The car was smooth as silk on the road.
汽车在马路上行驶得非常平稳。
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2. She smoothed down her hair with a comb.
她用梳子梳理头发，使其变得光滑。
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3. The floor is smooth and polished to perfection.
地板光滑且打磨得完美无瑕。