动词短语
中文翻译：Unknown
同义词：
['flatten', 'level', 'smoothen']
例句：
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1.The car was putty up by the time we arrived.
我们到达时，汽车已经平整了。
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2. The floor needs to be putty up before we start painting.
在我们开始粉刷之前，地板需要平整。
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3.The roof was putty up so that it would not leak when it rained.
屋顶被平整好，以防下雨时漏水。