名词
中文翻译：平坦化
同义词：
['flatten', 'level', 'smooth']
例句：
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1.The car was flattened out after the accident.
事故发生后，汽车被压扁了。
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2.The surface of the road is flattening out as the rain continues.
随着雨的继续，路面开始变得平坦。
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3.The construction crew was working to flatten out the uneven ground.
建筑工人正在努力平整不平坦的土地。