名词
中文翻译：未改进区域
同义词：
['unimproved zone', 'unimproved territory']
例句：
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1.The government has been working on improving the transportation system in this area.
政府一直在努力改善这个区域的交通系统。
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2. The scientists are conducting experiments to improve the efficiency of the solar panels.
科学家们正在进行实验，以提高太阳能板的效率。
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3. The company is looking into ways to unimprove the quality of its products.
该公司正在寻找提高产品质量的方法。