形容词
中文翻译：未退化的
同义词：
['unaltered', 'undamaged', 'undeteriorated例句：1. The old building has been left undegraded for centuries.（这座老建筑已经保持了数百年未被破坏。）']
例句：
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1. The old building has been left undegraded for centuries.
这座老建筑已经保持了数百年未被破坏。
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2.The soil was undegraded until the construction began.
直到施工开始之前，土壤都是未被破坏的。
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3. The ancient ruins are undegraded and still hold significant historical value.
这些古代遗迹仍然保存完好，具有重要的历史价值。