动词
中文翻译：Unknown
同义词：
['unsprung', 'uncultivated', 'unmanaged', 'untouched']
例句：
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1. The forest was once lush and green, but now it's ungreen due to overuse of pesticides.
这片森林曾经郁郁葱葱，但现在由于过度使用农药而变得不绿色。
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2. The river is ungreen with weeds and debris.
这条河里长满了杂草和垃圾，显得不干净。
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3. The soil in this area has been ungreen for years due to neglect.
这片土地多年来因忽视而被荒废了。