单词：untreated surface
untreated surface的用法和样例：
例句
- The renovated road surface is wide and flat.重新翻造过的路面，宽阔平整。
- Changes in the polymers that make up the rubber mean that the compound reacts differently to the track surface.组成橡胶的聚合物发生变化，就意味着轮胎材料对不同的路面情况作出反应。
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